Gutenberg Editor Is Not Showing As Normal

Hello, Team!

I’ve been facing this issue for a quite long time, trying a lot but couldn’t get any solution yet. That’s why trying to get help from here.

My Gutenberg Editor is not opening as a normal editor should open, check this image here… https://prnt.sc/269ila8

It is opening wide than a normal Gutenberg editor, I have a few other WordPress sites as well where the editor is working good but don’t know what causing it issue.

I tried some troubleshooting methods like deactivating all plugins and activating them one by one, switching to the default theme but nothing worked.

Please help me in fixing this issue.

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