I’d like to ask, if there is possible to import all ERC721 tokens owned by wallet at once. Add one by one works, but it is no very friendly. It should be possible, at least for ERC721Enumerable ones.
And other question, is it possible to force MM to remove / mark burned tokens? IE. if tokens are equivalent of game characters, who can die…
This is not possible, but there is an autodetect feature for NFTs, and you can also view your NFTs at https://portfolio.metamask.io/. If they do not show, you would have to import them one by one.
There is an option to hide tokens, see here on our Knowledge Base: