Join this Zulip organization if you are currently doing research in quantum gravity. It's geared towards current grad students, but anyone can join.
There are channels like AdS/CFT, String phenomenology, String field theory, Twistor theory, etc. You can (un)subscribe based on your interests.
Somewhat inspired by categorytheory.zulipchat.com
Any member can invite others. You can also email kasireddysreemanreddy@gmail.com for an invitation.