I made some progress on my issue, but after a couple nights of troubleshooting I'm near my end

My issue is that when indoor chime is enabled, the camera or unit powercycles. The camera cuts off and I dont get anything recorded in feed and the mechanical chime doesn't ring.

When the indoor chime is disabled, my connected google homes ring through the speaker and I get a visitor announcement.

Previously, I've had both, but that stopped working a few months back.

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I've replaced every component except the gen 1 Nest Hello Doorbell itself.
The mechanical chime: https://www.homedepot.com/p/Hampton-Bay-Wired-Doorbell-Chime-White-HB-2748-03/304225392
The transformer: https://www.amazon.com/dp/B07L9X9V57/
I've followed the wiring diagram and criss-crossed in every combination possible.

I've also tried removing the device from my Nest home and re-added it, all the settings reset to default but still have the issue.

in that case, i recommend switching out the light switch so it's a combo light switch and outlet in one. then you can use the external transformer.

to do straight 120v, you're looking at a more expensive transformer:

https://www.amazon.com/dp/B07L9X9V57

but you'll need to also extend the light switch out with an extension ring (since 120v wires can't be exposed.) it'll just look really ugly to have the transformer and the extension ring sticking out at every location.

Much cheaper to just change out the light switch with something like this:

https://www.homedepot.com/p/GE-All-in-One-Toggle-Switch-and-Single-Pole-Outlet-White-59797/203744889

or this:

https://www.amazon.com/Leviton-T5625-W-Combination-Tamper-Resistant-Receptacle/dp/B002LSI72M

Then you have an outlet you can plug into.