Why is my secretion so low during foreplay and during sex?

Menopause: It happens due to menopause and is not so uncommon for postmenopausal women.You can use, it is due to decline in estrogen.But it can be due to some meds like allergy and cold meds, antidepressants, you can use vaginal estrogen preparations, like premarin, (conjugated estrogens) or vaginal estrogen ring, or vaginal estrogen tablets check with your gynecologist about this as you will need prescription.

Maybe hormone levels: It could be lower estrogen levels especially if you are in or close to menopause. It could also be psychological if for whatever reason, you are less aroused that you usually or have been in the past.

Low secretion: Psychological such as low arousal, or physiological such as hormonal.