well, there is more than one way to measure activity I think the fact that Perl6 will have a proper IDE https://commaide.com/ is a very good sign

I think the level of activity on Perl6 project on github is a good sign
https://github.com/croservices/cro
https://github.com/croservices/cro-core
https://github.com/ugexe/zef
https://github.com/rakudo/rakudo

And level of activity on the Perl6.org site and the level of activity on twitter and the number of videos on youtube and even the level of activity on this small facebook group
I see all of this as good signs

And the Perl6 irc channel, is actually active and fun, but you probably need to start the conversation

Perl6 does have a small, but active community, and hopefully it will get better
Perl6 is a far more interesting language, than most language in active development today

One can wish, that more developers from Perl5 will start being part of Perl6 ... but if this doesnt happen, well it is what is

This small facebook group is a small nice and fun group, you are welcome to join the fun