Using the SW image junos-vsrx3-x86-64-23.4R2.13 the deployment went fine.
Using the SW image junos-vsrx3-x86-64-24.2R1-S1.10, FPC are stuck in online/ready state and there are fwdd alarms reported
Alarm reported post upgrade -->
root@SRX> show system alarms
2024-11-28 10:33:35 CET Minor Potential slow peers are: FWDD0
FPC in online/ready state -->
root@SRX> show chassis fpc pic-status
Nov 28 11:05:53
Slot 0 Online FPC
PIC 0 Ready
PFE related show commands go into timeout -->
root@SRX> show security forward-options resource-manager status
error: usp_ipc_client_recv_:ipc_pipe_read() failed read timed out after 5 second(s)
The issue is addressed and fixed in the JUNOS releases - junos:24.4R2 junos:25.1R1