@noughtnaut Welcome to the forum!
The why-question may find an answer e.g. here ✅ Consistent behaviour on clicking a listed item in vault - but if you don’t like it, you can change it back to the old auto-fill behaviour: Settings → Autofill → Click items to autofill on Vault view
I too would like to have the “Edit” option in the three-dot-menu on Vault view…
No, you don’t: Settings → Appearance → Show quick copy actions on Vault
