New stocks added

do trading212 actually tell the community when their requested security gets added?

Yes, but currently they release about 200 stocks a week in bulk. You can check the list of added stocks on those threads.

In the current a thread per request format, it becomes too much of hassle to update 100s of threads, I think.

May be a better online form request would be nice, some one could create Google form and then update spread sheet?