I have a lender who is giving customers an updated GFE (and TIL) if the escrow or prepaid interest amounts increase or decrease after the original GFE and TIL. No tolerance items are altered. I understand these two fields are not subject to a tolerance, however I am unsure if we are allowed give a updated GFE based these circumstances. Any guidance is appreciated!

Those do not represent a CofC. The only time you are allowed to reissue a GFE is when a CofC or a rate lock occurs.

Even if you had a changed circumstance, I wouldn't waste time providing a new GFE for unlimited tolerance items.