Assuming you have IOS/XE you can use the following guide to enable LFA for OSPFv2.
The basic configuration for LFA FRR is as simple as activating it under OSPF through ""
For remote LFA also the RLFA node computation is dynamic and no pre provisioning/configuration is required.
Hello @Ibrahim Jamil
you just configure FRR under OSPF (and TE tunnels) and that's it.
perhaps you need to confirm the version you use includes LFA-FRR.