Usually Appleseed involves donotreply@apple messages sent on a regular basis that concern some group participation for particular software Apple is looking to test and they thought you were a good candidate because of regular feedback on what they are working on. It starts with an invite. I participated for several years on some things.Out of curiosity, I did a little googling, and found a few places that point out that people that report feedback while on the Apple seed beta seem to get more attention on their filed feedback as opposed to folks that are on the Developer channel or the public beta. Whether that is true or not remains to be seen, as I’ve been on the Developer beta for many years and have seen zero response or acknowledgment on any feedback I’ve filed since before 2019. I switched one of my Macs to the Apple seed beta setting and I’m sure I’ll file some more feedback soon. Let’s see how that goes.