I think that there's a good chance that something else on your circuit board is also burned out.
I just had a similar incident with my power supply that stopped working.
I found a burnt thermistor on the circuit board,..
The label was burnt off of the thermistor, but I was lucky enough to find a YouTube video where the guy took apart the same Wamptek power supply and I managed to see the part number for the thermistor.
So I ordered a pack of 10 thermistors for less than $3 from AliExpress.
I replaced the thermistor but my power supply still didn't work, so I threw it out and bought a better power supply.
As
@harryS mentioned, if you can find out what the part number is on that component, you can probably get one for a few dollars and see if it gets your display working.
It's worth the $3 gamble to see if you can fix it, except for waiting a few weeks for the parts to arrive without a working e-bike.