Could she be going through perimenopause? If she's around your age she'd be in that window. Really glad you're doing so much better! I'm 51 and struggling with low energy too - working on fixing it myself.
Started just before my birthday after struggling with weight for so long - all those failed diets and routines left me feeling stuck. Stayed on the 0.25 for the whole year, slow and steady, building real eating habits that stick. Started 190, now 155, target around 145.