Should I get my MacBook Pro 2020 repaired?

you can do the calculus yourself—

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"

Genius Bar Reservation and Apple Support Options - Apple

Outside the USA

Contact Apple Support - Apple Support

Get your mac repaired and how much will it cost

Product Service and Repair Information - Official Apple Support

Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support

If you have AppleCare+ it will cover a large portion of accidental damage.

AppleCare - Apple

What is the nature of that damage you show in your snapshot?

If the screen is scratched but everything functions well, then I would follow Bob's advice about not paying to repair a 6-year old laptop. That type of scratch is cosmetic.

If the functionality of the computer is degraded due to the scratch, then certainly you should get a diagnosis and cost estimate. But keep in mind that a screen replacement often runs $500-$1000 and you can buy a brand new MacBook Air for $1300 and a brand new Mac Mini for $800. A 6-year old laptop might not have a very long expected lifetime remaining.

Following up on BobTheFisherman’s response, as explained here, your Mac is about to achieve “vintage” status.

Obtaining service for your Apple product after an expired warranty - Apple Support

I would not spend any money repairing a six year old computer.