Back when I still used Open OS this was not possible with modifications (in this case OpenGAPPS). If that hasn’t changed the following is the guide you need to update:
When having other packages installed with FP Open OS (e.g. opengapps or xposed) it is possible that you will get stuck in a bootloop after an update, if not installing these packages again.
Because these additional tools are installed on the /system partition, you need to reinstall them after every update, since the /system partition gets overwritten during the update. However, you should not loose data or settings, which are stored on your /data partition.
If you have not modified your FPOOS …
A backup is always recommended.
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