Can’t help you there. For $50 I wouldn’t expect too much.
According to the spec, your printer: Up to 90mm / sec
I have one of each of these:
Epson TM-T88V: up to 300mm/sec … this printer is fast
Epson TM-T20ii: up to 200mm/sec … this printer is fairly quick too, but noticeably slower than the 88V
Print speed aside, you are also dealing with Bluetooth communication speed and signal quality.