First of all, please don’t be too hard on yourself — thinning at the crown is incredibly common, especially in our 60s and 70s, and colouring can sometimes make it appear more noticeable because of contrast with the scalp. You’re definitely not alone in this.
It’s not necessarily “just something you have to live with,” though. Many people see improvement by switching to scalp-focused treatments rather than just regular shampoos. Products that support scalp health and circulation can sometimes make a visible difference over time.
You might want to look into KilgourMD, which focuses specifically on scalp and hair concerns rather than cosmetic thickening alone. It could be worth exploring alongside speaking to your GP or a pharmacist, especially to rule out things like hormonal or nutritional factors.
Wishing you the very best — and honestly, thinning hair is far more common (and normal) than we realise.