@Alexbn921 not sound advise. Have you used an emtb as a commuter?You would need to de-restrict, fit road style tires and put a bigger chainring on.
Even then you will get accelerated wear of the chain and cassette. Only using the small cogs on the rear wears them at a high rate.
A road style ebike should have a 50 front chainring.
Derestricted a stock emtb will ride faster than a roady.
Changing the tyres to around 2” light xc tires will increase your cruising speed by about 5mph.
I run Schwalbe Thunder Burt 2.1” in the ground casing, speed addix is to light…
I have a 38t chain ring, the 36t was ok but going as fast as I could peddle on the flat i needed a bit more, this is a good compromise for climbing mountains also.
As mention at 20mph cut off in North America you might not even need to derestrict.