Issues Editing Header in WordPress 6.6.1 (Astra + Spectra)

Hi everyone,
I’m trying to build a site in WordPress 6.6.1 using the Astra theme and the Spectra builder, but I’m having trouble with the header. No matter what settings I change, the header remains invisible, and I can’t add elements like a cart icon, social media links, etc.

I also used Starter Templates, but the header issue persists. Here’s what I’ve tried so far:

• Resetting the site with the WP Reset plugin – unfortunately, it didn’t help.
• Changing various options in Astra’s advanced settings, including setting things to "disabled" – also didn’t work.

It seems like I can’t edit the header at all, and any changes I make are not reflected on the site. Has anyone else experienced this issue or knows what might be causing it? I’d really appreciate any help!

Thanks!