Depends on the bike but I'd say it's not a common problem on electric bikes. Most hub drive bikes like my Orbea Gain have a connector plug on the motor cable, so it's a case of pulling this out to remove the wheel, then reconnecting it. It's a minor extra faff compared to a normal bike or a mid-drive. There's a plastic cover for the cable under the chainstay. I've done it out on a ride before with no issue. I also did it in the car park at work once. Sometimes the plugs can be a bit stiff to remove, especially if they've not been disconnected in a while so I grease mine with some silicone.
Some more modern bikes like the more recent version of the Orbea have a magnetic power connector so you can just remove and replace the wheel as normal.
Some cheapo bikes, conversions and older e-bikes have a wired connection with no plug. These would be a pain, so you'd have to patch the tube in situ, or use a "Gaadi" sausage style tube. Or go tubeless.
If I was interested in that bike I'd be looking for opinions of owners not that review. What does the Tenways manual say? I've no confidence in that reviewer who said this:
All this said, it’s no bad thing to have a professional mechanic handle your servicing anyway.
Servicing the motor maybe but fixing a puncture!??
Ridiculous.
Personally I'd avoid a bike with no plug or an inaccessible one. Do you need a belt drive? I know they're relatively maintenance free but wiping and oiling a chain every week or two isn't much of a hardship.
