Configuring OSPF for each seperated tenant in clustered r5600.

You can get to the OSPF settings via the gui under network / route domains.   That being said - I dont know of anyone that would do that.   Everyone i know that handles dynamic routing protocols does it via command line - regardless of vendor.   Also, after configuration - odds are you are going to want to test - and testing is most likely to be done at the CLI as well.

https://my.f5.com/manage/s/article/K65954220
https://my.f5.com/manage/s/article/K14490
https://f5-agility-labs-adc.readthedocs.io/en/latest/class5/intro.html
https://techdocs.f5.com/en-us/bigip-14-0-0/big-ip-dynamic-routing-with-tmsh-and-icontrol-rest-14-0-0.html
https://techdocs.f5.com/en-us/bigip-14-1-0/big-ip-tmos-routing-administration-14-1-0.html
you can dive deeper into imish (shell for adminsistering dynamic routing), and or zebos which is based on zebra code.    'Zebra code constitutes the development foundation for IP Infusion's commercial ZebOS'