Anders_ASUSWell I don't know what to say but my phone now gets reminders notifications. The only two things I tried was one set a reminder notification using the Google assistant and two change the colour of the notification to tomato. Either one of the two has to have worked because now I don't have a problem anymore.
Zenfone 8 does not have this issue. At least not on my device. The only two of my devices (and I have all ASUS Phones) that do not get any reminders from Google calendar are ZenFone 6 and ZenFone 7.