I just found out my new 2023 Bolt EUV does not have spare tire and jack kit today when my wife drove it back home after 10 minutes driving to work because of the right rear tire got punctured by a big size Philip screw. I open the hack back trunk and look every for the jack and spare tire but to my surprise they are not there!
Pumped up the tire with my small compressor so we can drive it to the dealer and they said the tire has to be replaced!
I asked them if I can buy a spare tire and jack kit at their parts and service department but they said nope, not available.
They said just try your best to drive it to the dealer when you have a flat tire next time... OMG can you imaging driving on a flat to the dealer while you got flat on the free way somewhere far from the dealer... common Chevrolet!
There are two schools of thinking:
School A teaches that tires are a lot stronger these days, and that most drivers will never have a puncture, and that 90% of punctures can be fixed using the sealing kit with an inflator. All three statements are statistically true.
School B voices the opinion of those who have had at least one tire blowdout in their recent history
I have a donut and a full-size spare. I carry the latter with me all the time.
Do keep in mind, though, that if/since you don't have a TPMS sensor in the donut or spare tire the Bolt will think you are riding on the rim and will make steering less sensitive, and bombard you with the Low Pressure warnings.
It's my understanding that a standard 25.5" dia tire will not fit it the spare tire well because the well is not completely round. Is that incorrect?
The Bolt doesn't have an OEM donut, but you can get one from 3rd party suppliers. Mine is, I think, intended for the Cruze, but it works with the Bolt .... I tested it over 50 miles

. But, it will not fit into the well. Unless you deflate it, but I didn't do that.
BTW, looking under the belly there is absolutely no geometric reason for this well to be 1" larger, which is all you need to squeeze the donut into. There is a huge gap between that well and the rear end of the battery, and no suspension elements protrude into that gap.
Most cars , ICE or EV, do not have a spare and its been like this for years. Nothing new here.
While spare tires are becoming less common, I wouldn't agree that most cars do not have them. We have gone through quite a few new vehicles in the past few years, namely:
2014 Prius - donut ✔
2017 CX3 AWD - donut ✔
2017 Bolt EV - nothing
2019 F-150 RWD- full size spare (IIRC) ✔
2021 Sienna e-AWD - donut option ✔
2022 EUV - nothing
We also looked at a 2018 RAV4, 2020 RAV4, and 2021 RAV4 Prime and all had full size spares (IIRC).
That's exactly where I keep my full size spare. Actually, it's probably the only place you can keep a full size spare - discreetly - in the Bolt