Welcome to the community 
PHP 8 support is slated for the upcoming version 1.4.0.
This is the main issue tracking PHP 8 support, and there are several other issues tagged PHP 8.
Testing everything is definitely welcome. I think 1.4.0-RC1 is not that far off.
James is the core lead, so he’ll be able to provide more information. Core Slack channel is also a great way to get questions answered.