Welcome! Some damaged hair never recovers, others find it takes weeks or months, depends how bad the damage is. My damage was mechanical (ponytailing, brushing, twirling) and chemical (box dye), I had to cut out quite a few inches that were just beyond salvaging.

Be sure you are using ingredients proven to reduce porosity and patch repair hair - coconut oil, hydrolysed protein, ceramides and panthenol. Honey/ sugar syrup with coconut oil seems to make my hair curlier as well as softer and shinier.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond/ fractionated coconut oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Au Naturale styling gelee
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect