They will probably be fine. I ran m8000 XTs for 2 weeks of downhill in Canada, including 22,000ft of descent in 1 day and a week at whistler, they were fine.
I would happily put XT single pots on my kenevo, they'd be fine for most UK riding.
Currently running Magura MT4 2pots on a Cube160. Described in the Magura blurb as 'suitable for ebikes up to 22.5 kph'.
I had my doubts as I'm used to Hope 4 pots on my analogue bike, also the Magura discs blued up from heat on a couple of big Exmoor descents. However they didn't fade and the pads haven't worn any more than expected.
I wouldn't. My deores were ok until they got wet or a bit of crap on the pad then they were useless. Considering how cheap Zees are I wouldn't get anything less.