sounds like you are really looking forward to installing a newer ROM. I have a solution but it'll cost you $30 on AliExpress. Last month I bought a T235 main board from AliExpress. I swapped out my t230 main board, updated to the latest Samsung firmware, and flashed this Lineage OS on it. I don't think there's anymore updates for T230 because the source code wasn't released (I could be wrong).