Have you checked these first?
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Help us help you: include your environment details. We've made this easy for you. Use the Copy System Info button in Admin Panel › osAwesome › Diagnostics, then paste below.
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osTicket v1.17.3 // osTicket-1.17.3-Awesome-102
On mobile in landscape the logo covers part of the menu, and the menu is not accessible:

I tried to reproduce that issue.
Using the 1.17.3-2 Demo I selected the logo that is closest to the shape of your logo.
I then adjusted the browser window to try and find a resolution that would trigger the issue.
Sorry, I'm just not seeing it.
I'm wondering if your logo has transparent space around it, like the 1st example on this page?