Build a character With 5 levels of Ranger and 5 levels fighter, if both choose archery fighting style, DnD Beyond gives the character +4 to hit and damage. The rules clearly state (even on this site) that regardless of the number of times you select the archery fighting style you max out at +2.

Thanks..... love the site I subbed for years.... I will be back eventually!

The rules say you can't choose the same fighting style twice, so try removing the second instance of Archery fighting style.