Metamask home screen token contributions

[nicolae-leonte-go]

I've scanned the snap documentation and I could not find a way to add a snap UI contribution to the metamask home/main screen.
Is there a way to add a custom type of token via Snaps?
Is there a way to add an additional tab (besides Tokens, NFTs and Activity) to the main screen?
Is there a way to add a link somewhere on the main screen to the snap homepage (allowing users to get there with one click instead of 3)?

My goal is to develop a snap that allows users to manage the balance of stealth tokens (zk based - like zeto).

Would you also be able to advise on the best way to derive an account/key based on the baby jubjub curve?

Thank you.