Hypotrichosis
May be idiopathic or hormonal related or heriditary.
Kindly check your Serum testestrone (free &total level) ,DHEAs level, serum cortisol level .
You csn use minoxidil 5 % gel topical applications twice daily for 6-8 months.
If not responding you can go for Beard hair hairtransplatation.
Next Steps
kindly meet the near by dermatologist /Endocrinologist for hormonal evaluation & treatment.