Will wearing underwire bra 24/7 allow scar tissue to form and lift breast fold to wear it was before it dropped?

At two months, it is unlikely that wearing anything external will recreate the fold.  You should wear an underwire bra now, especially since you have just recently seen this change.  There is little to be lost by wearing an underwire.

Although the chances are not high that it would work two months from the time of surgery, it is certainly worth trying and if your surgeon agrees. Discuss this with your surgeon as he or she may have other recommendations given your postoperative course, implant placement technique and your pre-existing anatomy. In most cases, it would not be harmful to wear an underwire two months following your surgery.

What is the best way to correct their breast fold after augmentationSupport of the fold for up toSix or eight weeks may be useful.You may try underwire bra with a cup removed. Tape placed in the fold pulled up can help define the fold. Dr. Dan Mills in Laguna Beach has also described using a shoestring