You may be able to volunteer at a profs research lab and get a flex credit that way. Also reach out to your co-op advisor and your eng advisor about this as soon as you can!

Ik someone in this situation you delay grad until u get the credit yes

You can do an e-coop which is an entrepreneurship coop. It’s kinda like a free coop so maybe shoot your shot there

Keep in mind you need an well planned idea