Huawei with Google services guarantee?

I would like to buy a used Huawei cell phone, which the previous owner once had Google services and has now been reset. Now I'm wondering if the guarantee has not expired and if it could have certain security holes since it is not official to install Google services

The one with the Google services depends on the model.
All older models and specifications still have Google services and will keep them!

And Android updates are also available without Google services.

A reset does not change anything if the Google services were preinstalled.

Huwai intends to load his own operating system Harmony OS 2.0 on all devices down to the Kirin 710 shortly, if that should happen, the end of Google services on the devices

https://www.chinahandys.net/huawei-harmony-os-auf-smartphones/