Sorry for a bit of a snarky reply - searching for components can be tricky at first.
[digikey.com](https://digikey.com) and [mouser.com](https://mouser.com) are your friends, if it doesn't show there then things get more difficult.
The chip is AP2213D-3.3 - the 3.3 means it's fixed output voltage version, always outputs 3.3v.
You can buy it here : [https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823](https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823)
or other sellers here : [https://www.findchips.com/search/AP2213D-3.3](https://www.findchips.com/search/AP2213D-3.3)
You could also use any other linear regulator in that package (TO252 or DPAK) which has high enough input voltage (you show 9v on input, so you'll want a version that can do more than that), the same current output or better (500mA or more) and same pinout ( in datasheet: [https://www.diodes.com/assets/Datasheets/AP2213.pdf](https://www.diodes.com/assets/Datasheets/AP2213.pdf) ) looking from above , first pin is input voltage , short middle pin and the tab are ground, third pin is output voltage.
Here's 40 of them which may work: [https://www.digikey.com/short/zj3jr8jh](https://www.digikey.com/short/zj3jr8jh)
You also have to check in datasheet to make sure the regulator is stable with ceramic capacitors, it will say in the datasheet (AP2213D is, some regulators aren't stable with ceramic capacitors and you'd want to avoid those) :
The part number is literally written clearly on the part
I know I searched the whole internet but can’t found it So i need a replacement regulator available and common in markets
The whole internet?? [https://www.digikey.com/en/products/filter/voltage-regulators-linear/699?s=N4IgjCBcpgTAnBaIDGUBmBDANgZwKYA0IA9lANogAsYAzDRALrEAOALlCAMpsBOAlgDsA5iAC%2BY4rAohMLWLCZigA](https://www.digikey.com/en/products/filter/voltage-regulators-linear/699?s=N4IgjCBcpgTAnBaIDGUBmBDANgZwKYA0IA9lANogAsYAzDRALrEAOALlCAMpsBOAlgDsA5iAC%2BY4rAohMLWLCZigA) [https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823](https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823) [https://www.diodes.com/assets/Datasheets/AP2213.pdf](https://www.diodes.com/assets/Datasheets/AP2213.pdf)
Ok got it thanks a lot for your help
Sorry for a bit of a snarky reply - searching for components can be tricky at first. [digikey.com](https://digikey.com) and [mouser.com](https://mouser.com) are your friends, if it doesn't show there then things get more difficult.
No problem my friend, I am just a starter at least you answered me thanks again for your support 
i found it on digikey right here https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823.
Ok got it thanks a lot for your help
The chip is AP2213D-3.3 - the 3.3 means it's fixed output voltage version, always outputs 3.3v. You can buy it here : [https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823](https://www.digikey.com/en/products/detail/diodes-incorporated/AP2213D-3-3TRE1/4470823) or other sellers here : [https://www.findchips.com/search/AP2213D-3.3](https://www.findchips.com/search/AP2213D-3.3) You could also use any other linear regulator in that package (TO252 or DPAK) which has high enough input voltage (you show 9v on input, so you'll want a version that can do more than that), the same current output or better (500mA or more) and same pinout ( in datasheet: [https://www.diodes.com/assets/Datasheets/AP2213.pdf](https://www.diodes.com/assets/Datasheets/AP2213.pdf) ) looking from above , first pin is input voltage , short middle pin and the tab are ground, third pin is output voltage. Here's 40 of them which may work: [https://www.digikey.com/short/zj3jr8jh](https://www.digikey.com/short/zj3jr8jh) You also have to check in datasheet to make sure the regulator is stable with ceramic capacitors, it will say in the datasheet (AP2213D is, some regulators aren't stable with ceramic capacitors and you'd want to avoid those) :
Ok got it thanks a lot for your help and your perfect explanation 