I am not sure I understand your goal.
I think your are trying to use FBF to create the routes for distribution in BGP.
This is more typically done by having the static routes on the edge device facing the subnets and then using BGP to distribute them.
Or better to have the connected device with those active subnets do the initial injection into BGP.
If this is an aggregation point then you might use a generate or aggregate route to create the larger prefix.
FBF is typically used to sort traffic by some source or port criteria to send some one direction while the main path is in another.
To check your BGP setup you would use these commands
See what is being advertised to a neighbor ip address
show route advertising-protocol bgp 1.1.1.1
see what is being received from a neighbor ip address
show route receive-protocol bgp 2.2.2.2
See what is in the FBF routes
show route table FBF-REDIRECT.inet.0