EVM transaction extra gas not refunded and priority fee not paid to the miner

[surangap]

XRP is 6 decimal points. to calculate the refund, the actual fee(more than 6 decimals) is subtracted from the already paid fee(6 decimal point number) which leads to 0
e.g. 998765 - 600589739 = 0, subtraction is uint saturated.
reference -> https://github.com/futureversecom/trn-frontier/blob/fba84577bf6507d76d40af891d2db38f4e385c11/frame/evm/src/lib.rs#L893