This is the "exercise
" we always suggest for frænulum stretching, and I cannot see why it would apply any less in your case, having a scar in the position of the frænulum.
The outright best
treatment for a firm scar, is continuous pressure, leading to the marketing of various "scar gels" for this purpose. Unfortunately, that is not applicable to such a mobile area, so stretching, firm but not painful, as often as possible is the closest you can come.
It remains an interesting question as to whether there is any point in having a frænuloplasty in the first place as while it "loosens" the frænulum, there is no reason to believe the resulting scar will actually
be stronger under tension and as not only have I pointed out frequently
in this forum in the past but you mention your specialist did also, excess tension on the frænulum does not
imply something wrong with the frænulum, but simply means your technique (in general, failure of lubrication) is providing too much stress on the frænulum!
Now, back to the matter of softening scars, a potent or "ultra-potent" steroid can be used to facilitate this; such as betamethasone or triamcinolone 0.05% or even 0.1% if available and preferably in the ointment form, applied only
to the point of the scar.
Probably more effective, but rather "fiddly" in this case, would be injection of a similar steroid (Such as "Kenacort-A10®") directly into the scar. Whether you really
want to go back to the specialist for more argy-bargy is another matter. We are inclined to wonder whether you would have been at least as well off using that six weeks simply persistently stretching your frænulum!