These laptops have the dreaded Butterfly Keyboards which tend to fail quite often. Plus they have a bit higher likelihood of having Display issues due to possible display cable issues.
Keep in mind you have a 6 - 7 year old laptop. If the Battery or Top Case/Keyboard Assembly has never been replaced (or was replaced some years ago), then the Battery most likely is worn out or possibly even failing. The Cycle Count if it is high would be a warning sign, but you can have an old battery with a low cycle count. An old battery is just as bad as one with a high cycle count. If the Battery Condition is "Service Recommended" , or "Service Battery", or "Replace Soon", or "Replace Now", then you are going to need a new Battery.
However, this will not alert you to a battery which has a potentially bad cell. In my own personal experience supporting thousands of my organization's Apple laptops.....half of all bad batteries never show any of these signs. I've had to develop other tests to look for potentially bad batteries.
Keep in mind an official Apple Battery replacement/repair will be expensive (about $250 US).....this would provide you with a new built-in Keyboard as well since Apple would replace the entire Top Case Assembly which holds the Palmrest, Keyboard, Touchbar, Speakers, and Battery.
macOS 13.x Ventura is the last supported OS for this model. Ventura will stop receiving security updates & support at the end of 2025. At that point, many third party apps will likely no longer be receiving updates because they follow Apple's lead so any apps which require online access will slowly start to fail at that point.