I have checked multiple block explorers, and can see no record of a transaction involving that address. How long ago did you make the transaction? It seems that it has already been dropped from the mempool, and so the bitcoin should be available to be spent again from your wallet.
Is this because of my transaction fee? My transaction fee is set to 0.00010000 - is this too low? And if so, what should it be?
It is impossible to say. The total transaction fee is not important - what is important is the fee rate. Paying 10,000 sats for a transaction which is 200 vbytes would be 50 sats/vbyte and the transaction would confirm quickly at present. Paying 10,000 sats for a transaction which is 10,000 vbytes would be 1 sat/vbyte and the transaction would take weeks to confirm. Without knowing how large your transaction was, we cannot say for sure whether 10,000 sats was too low or not (although if the transaction did not confirm for 2 weeks and was dropped from the mempool, then chances are yes, it was too low).
Also, is there a way I could top off this fee?
As I said above, I can find no unconfirmed transaction in any mempool involving the address you have linked. You should therefore be able to make a new transaction from your wallet using the same coins. For reference, a fast fee at the moment is around 20-30 sats/vbyte.