Can anyone help me better understand how the speed of a transaction is determined? I seem to have a couple stuck with 0 confirmations…

I have made 2 recent withdrawals from my wallet (both less than 50$) and they have been sitting on chain for quite some time, one has been sitting on chain with 0 confirmations for a couple days (here: https://www.blockchain.com/btc/tx/8868162441323a47322a81762a7a887c2ed044968166904686b7507160a44b38) and here (https://www.blockchain.com/btc/tx/85c5cb27ef45f1365752985aea8a13dc2393f4fc173d1d24c56efb1218b7ae54).

Will these eventually be confirmed and if so, why is it taking so long? I’m thoroughly confused as I’ve never had transactions take this long to confirm

**Just want to thank everyone for the incredible information provided. All of it has been very amazingly helpful!

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