But if you still insist on looking for them I have a list of a good source for Bitcoin development that I think you can use for developing check this link below.
- https://github.com/igorbarinov/awesome-bitcoin
That could be solved by also running self-hosted block explorer or Electrum server. Besides, bcoin development is very slow these days where one of bcoin member state they're yet to support new features[1].
[1] https://github.com/bcoin-org/bcoin/issues/1183#issuecomment-2107543005
https://www.quicknode.com/chains/btc
still supported. that's where i've used it. i can go without taproot to be fair . support on commercial platform means they do not have any real flaws for now