macbook pro battery is charging but not incresing percentage

Contact Apple Care.

Every Mac comes with one year of hardware repair coverage through its limited warranty 

and up to 90 days of complimentary technical support. 

• By calling 800-275-2273 (requires you to run a remote diagnostic and provide proof of purchase)
  • U.S. technical support: (800) APL–CARE (800–275–2273)

https://www.apple.com/support/products/mac/

or

Click inside the box to choose an option.

 https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

For Intel-based Macs:

Try suggestions given in this article.

https://support.apple.com/guide/mac-help/if-your-battery-wont-charge-mh29198/11.0/mac/11.0