Note the minimum fee here is 9sat/byte
that does not mean that blocks are grabbing all transactions 9sat up
it means SOME mining pools are selectively (pot luck lottery style) adding a couple random transactions outside the "highest fee first" policy just to seem reasonable.. the 9sat/b does not mean your 16sat/b has priority over say the 20sat/b ones nor means that your 16sat/b should come before the pot luck lottery of cheap fees outside the fastest first policy
you just have to be patient
The docs from mempool.space are imprecise.
However, I believe that the minimum fee is the minimum fee rate you need to get into the standard 300mb mempool that most nodes use.