I use an InnoSpire Go and sometimes Ombra tabletop nebulizer.

To clarify my last post: I only purchased my bottle Sterilizer after I called InnoSpire Go to ask why they had nothing about steam sterilization as a cleaning option in the manual (sounds like I have the same literature as you). They said yes, I could steam clean it, and directed me to their very own FAQ online: "'Q. Can the mouthpiece assembly be disinfected? If so, How? A. Yes. There are three ways you can disinfect the mouthpiece assembly which are boiling, STEAMING, and immersion in a Korsolex® disinfectant solution." ( https://www.healthstore.philips.com/innospire-go-faq)

I also asked why the steam-clean method wasn't in the paper insert and manual included with the product, and they said they had just listed the cleaning method used / tested during product development or something like that, hadn't updated their literature, etc.

Obtaining direct verbal and written confirmation from the company PLUS reading the 2020 article I sent which states that steam cleaning "Can be used with metal components (e.g. metal vibrating mesh)" was all the confirmation I needed!

No reason anyone should go to steam cleaning if another system works well for them -- but anyone with an Innospire Go who wants to try another system should know that they can indeed steam clean it via baby bottle sterilizer 🙂