You'll need to use the Map > Tracklog > Set Time Zone Offset command: Work with the Map module in Lightroom Classic CC
This part of the Map module is very confusing. Camera times are usually recorded in "local" time without reference to any time zone, the track log is always in UTC, and your computer is usually in some other time zone. To match the camera times with the track log, LR assumes the camera times are in the time zone of your computer. When that's not the case, you have to use the Set Time Zone Offset command.
I know there is no official time zone offset EXIF tag
After all these years, the standards commitee finally added time-zone offsets to Exif Version 2.31 in 2016 (e.g. EXIF:OffsetTimeOriginal). But I think few cameras use it. And by design, LR completely ignores any time zones that are present in the metadata (with a minor exception for some manufacturer's QuickTime videos).
I eventually got this to work, so thank you for the response! In this case I had to give it a +4 hour offset to get it to sync properly.
Initially it was not working and was tagging photos the same as before. I eventually noticed that I had to select the correct track along the bottom of the map module.
The tracklog I had contained about two weeks worth of data, and initially was set to "All Tracks" above. When I dialed it down to the correct day, it worked properly. This means I have to individually auto-tag each day, but at least it works now.