I don't have any personal experience but from research, I found two issues.

The diagnostic injections are to determine if the pain is in those specific nerve areas. It appears that was a positive result.

The Botox injections are more hit and miss. Some doctors are better at finding the spot than others. Some patients suggest also getting some Botox in the occipital area. Those who find it successful frequently complain about it lasting only 4 to 5 weeks rather than 3 to 4 months. Some have had as many at 50+ units of Botox to get relief. The repeat cost and discomfort make it questionable for many.

There is a nerve microsurgery that has shown to be successful. If probably would cut the nerves where the Lidocaine injections were successful. It is permanent and lasting for those who had it done successfully.