https://www.quora.com/Are-electric-cars-more-reliable/answer... seems quite comprehensive.
Overall, they should be more reliable, though it’s early days and there are teething problems. At the moment they are at least at a similar level to Petrol engines.
https://www.fleetnews.co.uk/news/latest-fleet-news/2019/09/0... supports this.
ICE cars contain a chunk of metal that is guaranteed to wear out from day 1 of the purchase due to friction and combustion effects. So overall not that different.