Based on the sorts of recommendations in [1], probably not to any meaningful degree, if at all. Much of what it's asking for is table-stakes functionality, along the lines of "have a factory reset feature", "use encryption when transmitting data", or "have a product support page" - things that any responsible developer should have been doing already.

[1]: https://nvlpubs.nist.gov/nistpubs/ir/2022/NIST.IR.8425.pdf

I'm sure, it will depend on how large part of product is made abroad and in which country.

I wonder, how strict will be regulations on Chinese software parts. For EU/US/Australia/Korea originated should be less strict if could prove source.

I honestly don't know...but isn't this sort of like when toasters first came out? I don't know for sure, but i guess toasters maybe didn't have the UL symbol...and probably some accidents happened, maybe house fires and such? Fast forward to nowadays and toasters tend to be pretty safe - well, if used properly and purchased from a reputable manufacturer who has been tested via entities like UL, etc....So yeah, maybe a little extra cost...but wouldn't we want at least some modicum of a signal of quality assurances for IoT devices - like we have for things like toasters?