Thanks, tried it.

My problem is more complex.
The MetaMask address is for more blockchains like ETH, Polygon, xDai and some more.

How can i check "easy" what my address holds?

Some are listed at opensea, but not all.
If i had an unknown NFT (for that i dont know the token-id) like on Polygon, how can i found it?
With Etherscan there is no option to search directly for transfers.

At xDai ive see the sended NFT.

But there are more NFT-Mint chains that work with ETH, that i dont know.

Is there a tool or an App that scans all ETH-based chains and let me know how many NFT's i hold at my address?