Blue Wallet promised they would start to support below 1 sat/vByte transactions mid-July. I can see in the release notes that this PR has been included in the 7.2.0 release.
But won't it lead to frustration of unconfirmed transaction? Because lmost all nodes have 1 sat/vbyte and that is how it is in their default settings. If someone wants to make less than 1 sat/vbyte as the fee, nodes will reject it but if there is a node that accepts it, it can lead to longer wait before confirmation if the transaction is not dropped out of memory pool, but it can drop out of memory pool.
They have also fixed a fee display bug that showed the fees in an untraditional format. I guess the version is being rolled out in stages because I still haven't received the update for my Android phone. I am not in a hurry. It will be there.
I also went to their GitHub to know if they have it there, but version 7.1.8 is still only the last version for Android.
Only iOS latest release is there.