If you used UUPool, you have mined the BTM mainnet coin. This means you have to wait until an Exchange accepts the BTM mainnet coin before you can send it anywhere. So it will just HODL in your Bytom wallet.
If you used AntPool, you have mined the BTM ERC coin. This means the wallet address in AntPool is an ERC20 address of BTM from an exchange that currently has BTM on it - i.e. gate.io or another exchange.
In my case I mined some BTM in UUPool and it was then sent to my Bytom Wallet - it is just sitting there until an exchange accepts that mainnet BTM coin.
I also mined in AntPool, those coins are pending payment (hopefully on Monday) to my BTM - ERC20 exchange address.
Hope that helps.
That clears up some confusion for me. Thanks.
One question though: Can the official Bytom Wallet receive payments from Antpool (ERC20)?
I do not think so since the Bytom wallet is for mainnet type = they are different tokens / coins.