There is some discussion on the new bitcoin-dev mailing list, which has moved to Google Groups in case you haven't heard btw, for adding some new BIP repositoy maintainers:
https://groups.google.com/g/bitcoindev/c/cuMZ77KEQAAApparently, the load is too much for luke-jr to handle all by himself.
Hopefully this will mean more BIPs will be merged into Bitcoin Core as there seriously has been way too long a delay for getting anything reviewed these past few years.