What you're saying is worth looking deeper into, but it's not enough to start making claims yet, imo. There are probably hundreds or thousands of proposals and papers floating around now that talk about different things one can do with genetic engineering. If something should arise that is related to the concepts in some of those papers you wouldn't necessarily jump to the conclusion that there's a causal connection. Not without more information, anyway.
"it is the aspect of the genome which is hardest to square with a natural origin" This doesn't tell me it's artificially created. The most this tells me is it's not well understood.
"The fact that they did not put this forward themselves in in and of itself suspect." It could be related. Or it could be unrelated and there maybe some other explanation. My point is, when you want to charge someone with a serious crime, which I think this falls under, you need to come with some pretty strong evidence that directly ties whoever is involved to the events of the crime. This evidence may very well exist and it's not been shared publicly.
Like me, you probably viewed it as a deliberate attempt to distract from his administration's incompetence. Like me, you probably decided right then and there that it was a natural virus and recognized that a bulk of the people saying otherwise just HAPPENED to be people who wanted Trump re-elected.
There comes a point where you have to recognize that you have made decisions with incomplete information and emotional biases, and that those decisions sometimes need to be completely cast out, with an objective, reasoned look at the latest facts.
At this point, the evidence that you reasonably state needs to be found has long been eradicated by the second most powerful nation state the world has ever seen. An authoritarian one, with the ability to make any critic disappear. There will never be an actual smoking gun, because the CCP had months of knowledge of what they had accidentally released before the rest of the planet knew it existed. All of the evidence was within their borders. The eradication of this evidence is itself an incredibly strong indication of guilt, particularly combined with the mountains of circumstantial evidence that point to this being a lab leak. If a detective walks into a suspected murderers bedroom, and finds that all of the surfaces have been bleached and the carpet has been ripped up, he doesn't have definitive evidence that the suspect is a murderer. But he does have evidence that they are trying to hide something.