I also have been experiencing the same issue of not being able to scroll the plugin menu.
Obsidian on my tablet is displaying as desktop version so I played around with the suggestion in this post Tablet version in landscape mode, but was unsuccesful in resolving the issue.
Please let me know if I can provide additional information.
Galaxy Tab S6 Lite SM-P613
OS: Android v14 One UI v6.0
Obsidian: v1.5.8
Community Theme: Minimal v7.5.2