Not many POE doorbells out there.
there’s still the 1st gen expensive Ring Doorbell Elite that does POE from 2017
UniFi probably is the better newer one although still pricey. But if you can buy in US the price probably ok.
I guess not many POE models on a 2 fold problem.
1. Not many people know POE so only network enthusiasts or tech people will be interested. With POE u also need POE switch which normal consumers may also be reluctant to buy vs wifi everyone seem to have and to power either via battery or normal AC or DC adapter.
2. Manufacturers only compete on price (like many IoT devices) as consumers usually use that as yardstick so manufacturers skim on all these, POE or even wifi many doorbells are still on 802.11n like aqara even though it was launched in 2023-2024
can check out below
https://reolink.com/product/reolink-video-doorbell-poe/