Unable to reliably Geo tag

I use me compact camera to assist in remembering and documenting my travels. As such I rely heavily on the photo Geo tag facility.
On my Panasonic DMC-TZ100 this is done via an app on a mobile phone which records the data points and transfers them to the phone which then attaches them to each photo.
I did find this to be more reliable than cameras that directly Geo tag as that method can be ever so slow.
This worked perfectly until my mobile was stolen and I had to purchase a new phone. I chose the Huawai P20 Pro. I has a good camera I believe.
It runs android 9.0
The problem I have is the Geo tag capability is now so unreliable as to be basically useless.
Panasonic after numerous support actions have advised me the app is not validated for android 9.0 but say no one else is having a problem.
Can anyone help me? Am I doing something wrong?
Are there others out there experiencing the same problem?
Thank you
On my Panasonic DMC-TZ100 this is done via an app on a mobile phone which records the data points and transfers them to the phone which then attaches them to each photo.
I did find this to be more reliable than cameras that directly Geo tag as that method can be ever so slow.
This worked perfectly until my mobile was stolen and I had to purchase a new phone. I chose the Huawai P20 Pro. I has a good camera I believe.
It runs android 9.0
The problem I have is the Geo tag capability is now so unreliable as to be basically useless.
Panasonic after numerous support actions have advised me the app is not validated for android 9.0 but say no one else is having a problem.
Can anyone help me? Am I doing something wrong?
Are there others out there experiencing the same problem?
Thank you

I used to capture a Geo Tag file for various photoshoots then enter the file into the mapping module of Lightroom which then Geotagged all the images for that photoshoot. It is vital that the clock in the phone is synchronised to the Camera. I am sure this arrangement is still available but I have not used it for some time as my current camera has GPS so all imaged are Geo tagged.
Dave
Dave

You have a choice in my camera of setting a mode in which the camera still tracks GPS when switched off and I use this mode. This normally means faster acquisition. In most cases by the time I have set the camera up, it has acquired GPS. I did checked through files on some recent photoshoots and on a couple of occasions it failed to record the GPS on the first shot. This is of no significance to me as I regard Geo tagging is something I like but not that important. For the occasional shot without tagging I can easily copy the tag from the next shot in LR. Overall having GPS in the camera has ben a great advantage, partly because I could not always be bother to capture a track on my phone and partly because I had several problems with the clock drifting between phone and camera.
Dave
Dave