haven't been in any online key signing parties, only a handful of
physical ones so far (makes more sense seeing/confirming/trusting in
person...). but all that, pre-covid...
to work around the pandemic somehow, i'd probably start with
git.devuan.org. lots of authenticated devuan devs and users there, with
some gpg keys already available..

jitsi meetings/online pads as public links, break the whole "trust"
thing.. how do you confirm any visitor there?

a few more links :

- cryptoparty.in is a helpful resource in organizing :
https://www.cryptoparty.in/organize/howto

- signing-party package
(https://salsa.debian.org/signing-party-team/signing-party) , contains
tools to assist in OpenGPG signing parties

2c,
d