It's 2021, servers are a fraction of the pice and vastly easier to deploy than they were in '08 when Apple needed google for these apps.
I'm not convinced we use the G-suite of products for any particularly good reason other than they have a G and they are free. For the margins and scale of ios Apple could easily provide equivalent apps in-house if customers need them to be free or let the market set the price for non-ad supported versions.
Since switching I've only used gmail and maps/waze from g-suite. I'm 90% certain I can replace maps/waze in the near future.