I'd like to see actual evidence that Covid does in fact come from "gain of function" experiments in the Wuhan lab. So far as I could see, your reference doesn't do that.
Considering 1. the concerns that had been raised about that research in general (and so such a research was halted in US, and US granted funds to that research in Wuhan instead) as well as about safety specifically in those Wuhan labs and 2. exceptional coincidence in time and space I think the onus in on the labs to prove it isn't their virus or at least come maximally open about their situation. If anything we've so far observed completely opposite - there is absolutely no credible information nor about the labs and the related research nor about virus origination investigation.
You made the claim that "Covid itself is a result of such accelerated selection performed in that Wuhan lab - what is called 'gain of function' experiments." Not "might be". You said "is".
When I asked you for evidence, you try to reverse the burden of proof. No, you made the claim, you're the one who's supposed to prove something.