So now it is clear your nerve has very limited loss of function. I mean kinda 90 - 95% of normal function
Releasing a nerve means to decompress it, but you have to know if you have it compressed. Nerve can be compressed , for example by a bone or some scarr tissue.
Generally if you had at least 50% of feeling after surgery, then perhaps there is little chance, that the nerve still has some small ability for further recover, because there is little chance that something blocks a litle of nerve function.
But if your feeling after surgery was very poor, then the nerve was damaged more severly and your nerve just could not restore its 100% function. At this point you can't do nothing
Probably no surgeon tells you if you have nerve compressed, but you can try to consult... nothing too lose
you can take laser therapy
eventually cortisteroid injection near the nerve foramen if the canal is not very long... this is sometimes performed if there is compression suspected. Sometimes compression causes inflammation which affects nerve function, but since you do not have any pain, the compression is unlike, but possible...even if the nerve has not recovered due to compression, now it is probably too late. Additionally if a nerve is compressed somewhere in lower jaw or anywhere inside a long bone - then probably nooone will touch this. Not clear situation, and surgery may make it worse.
you can try some things I metioned, but to be honest you have very low chances that something will help
If you are so sensitive to nerves damages you nerver should have had any surgery
Now, for 90% your condition is permanent. But check some last options, nothing to loose