Removing lines from page

I installed the Twenty Twenty One them to https://bluecollarsommelier.com

I also installed the Options for Twenty Twenty One plugin. I works well on the Front page but on the Tasting List page,
http://bluecollarsommelier.com/tasting-lists

I can’t get the header to enlarge like on the front page and how do I get rid on the lines around the tasting list text? They should all the the same width.

Thanks

The page I need help with: [log in to see the link]