1x12 chainring -Can i use it for 10 spped ?

The good ebike is getting its drivetrain replaced.

Original set up was 1x12 with a direct drive FSA chainring(FSA WB604 / 34T / DM / Steel)- Cranks are -FSA CK-745 165mm

Mech is a 12spd XT

What I want to do is change the 12 speed to a 10 speed, and ive new 10spd XO mech and shifter to fit on in place of the xt mech.

The chainring is a bit jaggy, so replacing that is a must, but when i look, all it tells me is it is a 1x12

So can i stick with this same ring, but run a 10spd set up on it without issues ?

Im replacing the wheels(for pro5) the brakes for T4V4 on the HD rotors as well as chainring the cassette/chain/chainring(shifters/mech etc)

I have a slight issue because original set up on the wheels, is a center lock rotor,, and the freehub is 12spd microspline 

The bargain crc wheel is an HG freehub and 6 bolt

So to run it as 12 ms, id have to replace the freehub from HG to microspline(Cost 90 quid) which is a bit annoying as ive the new xo mech and shifter here doing nowt.

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OR- and this is probably the least headspinning way, to leave it as a 12, just replace the chainring/chain/cassette with the specced parts by replacing the Hope HG with an MS freehub

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I know this is all a bit confusing, but then its true ive a habit of making things difficult for myself  🙄 

I fully blame CRC for this. It's their fault they sold me this stuff.