Inconsistent gas mileage…

Hey yall. Having this issue on my 2014 tC. SUPER inconsistent Gas Mileage, right now I’m reading 18.0 MPG. Third photo is from 1 week ago I filled up the tank, drove 10 miles and was missing almost a whole quarter. But then it improved as the days went on…

recently had the vapor canister and purge solenoid replaced (had stopped working) & the mileage is still sort of bad… any ideas as to what could be happening? Had a service at Toyota recently and they did their free multipoint inspection while they were doing my alignment and other things but they said my Fuel lines and everything else is fine. Could it be my spark plugs, MAF? Not sure what it could be…