Unfortunately im not and someone else said nothing can really be done because it is only a segwit transaction so al i can really do is wait idk how true that is either. Im the receiver but it is on my cashapp wallet.
Since it is cash app you are receiving into them from your end you cannot do anything because it is not a non-custodian wallet that allows transaction bumping. The only way is if the transaction is not from an exchange and the wallet of the sender can actually bump the transaction you can simply ask him to or better still double spend your the transaction again from there but if it is an exchange sorry nothing can be done, you may have too wait and hope they don’t continue to rebroadcast the transaction with such low fees.