Honestly, dont worry about it.
Ive had my BWM i3s for nearly 4 years, and never come anywhere close to running out of charge, even though I’ve done some big distances and its got a relatively small range.
These days, most cars have a decent range, so you’ll be either unlucky/careless to come anywhere close to running out.
But, the RAC now are rolling out EV emergency charging. Dont let it put you off (despite what YouTube and the vocal antiEV crowd want to yell about ).