I’ll say first that this shit is supposed to be your physio’s job. They should be your first call if there are any issues not some forum that has no clue to as to your medical history and current status.
You should be following their instructions and adhering to any exercise prescription or movement restrictions given to you.
Whatever they say goes and overrides stuff you may get on this forum or elsewhere on the internet.
Now that we’ve got that out of the way let’s give this a shot.
What seems to be the main problem/s?
Speed? Awkward cadence?
Legs giving way/weakness?
Something else or a combination of the above?
Different problems. Different solutions.
In the end tho you just probably have to work at it one step at a time… pun lel. Even if you go from walking one step awkwardly to walking one step better that’s gains. Keep improving everyday and however long it takes you’ll be back to full mobility.