Anti Reflective Coating on MacBook Pro 2015

We are not Apple, rather end users like you. We can't quote hard pricing. Pricing also depends on where you live so we are not in any position to provide exact costs in this venue.

However we know that with Retina MacBook Pros, the display assembly is all one piece--you cannot replace only part of it. In the US that can be in the US$500-600 range parts and labor.

Have an Apple retail store evaluate and give an estimate. Your model is still within Apple's "boundaries" of what they will repair and maintain parts. Their criterion in most countries is five years for date of last production, For the 13-inch 2015 MBO, that was July 2017. Therefore, your model should have Apple parts and service support until June 2022.

https://www.macrumors.com/2017/11/17/apple-extends-free-staingate-repairs/

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"—

https://www.apple.com/retail/geniusbar/