my ipad pro has got a glowing dot and a grey dot on display that will not go

Your iPad screen has been damaged - with visible cracks. The dark patch is failed edge-backlight LED; the bright patch is likely from partial de-lamination of the screen backlight diffuser.

Your iPad requires repair:

iPad Repair & Service - Apple Support

Follow the link provided - and you'll find the estimated cost of repair for your specific iPad.

For practical purposes, in lieu of repairing and returning your own iPad, Apple usually exchange the iPad for a renewed/refurbished iPad of the same model and specification. The cost of the exchange is the same as would otherwise be charged for repair.

If you have an active AppleCare+ plan, the cost of repair is reduced to a small excess/deductible fee.

When, or indeed if, you have your iPad repaired is entirely up to you.

You can delay having your iPad repaired for as you as you can live with the issue - or until the iPad stops working.