Thank you. So I have a few options. I think I could use the yolink outdoor door sensor and cut wires and attach to doorbell but hard to feed wires through wall.
Other option is a Tuya button, wifi based, whose app can interface with echoes.
And as mentioned, probably cheaper to just use a cheap doorbell camera, Alexa compatible, with button.
I currently have a working wired plain doorbell now, just not loud enough in rest of house. Thank you all.