Most likely those packs are authored incorrectly. "Invisible Item Frames" packs tend to be really low-effort packs so people don't learn to package them properly. I don't recommend trying to fix it yourself if you're inexperienced for a variety of reasons, not the least of which being that unzipping a pack is a potential attack vector for viruses. You should never have to unzip a resource pack in order for it to work.
Of course without actually seeing and examining one of the packs in question this is just a guess on my part. It could be an entirely different problem, though generally a pack that's even a little bit legitimate will show up in the Resource Packs selection screen.
I suggest either continuing to look until you find one that works... or else learning to make your own. As I said, such packs are generally pretty low-effort and so a fairly suitable project for beginners. For tools, you'll definitely need BlockBench (modeling software for Minecraft) and Notepad++ (for editing .json files in Windows), and may also need an image editor like Paint.net and an archive manager like 7-Zip. All of those are freeware.
I hope that helps you.
I'll try xd just the problem I found is that the ones I've downloaded worked for other. thnx tho-