Different logo sizes

Hello again, could someone help me with my issue regarding the logo in my site?

Currently, the logo on the homepage looks fine: https://bfb.lr-dev.com/

However when in the single post it is actually really small:
Please see: https://bfb.lr-dev.com/2021/11/10/dfgdfgdfgdfgdfg/

Any help would be appreciated. Thank you!

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