Best way to migrate nft's collection to other chain?

Hello, my nft project currently still on ETH's network, and we are a game based want to move to other chain network for cheaper fees.

we are planning to move to polygon, I have tried from polygon version "the nft bridge" https://bridge.mintnft.today/ is not working. Polygon's team on discord is ignoring this issue, as well as the reddit's thread i made, it almost a month. I have inspected seems none of the nft was successfully bridged?

So I tried wormhole, but wormhole will create child-contract on polygon by themselves, so I have no ownership to verify in etherscan or to update the brand.

any suggestion or information for me to learn would be appreciate thanks.