Hi Michael...welcome to the Forum
The only thing I can really find on the FPR is the following information and replacement filter assembly from somewhere in the States.
We recommend preventative replacement of the fuel filter at 60-80,000 mile intervals. Replacing your fuel filter with this Genuine BMW fuel filter with built in fuel pressure regulator will help prevent the filter from becoming clogged. A clogged fuel filter can result in a variety of problems including stalling, cold start problems, and reduced performance.
https://www.turnermotorsport.com/p-19439-fuel-filter-with-pressure-regulator-e85-z4-e89-z4/
Have never removed/refitted one before but assume it is in the fuel tank and requires obvious H&S and common sense with flammable fumes, etc.
Let us know if you find anything else out about the R&R of the filter
Cheers Trevor