Hello Qida,
To help us get a better understanding of the issue, we’d like to ask a few questions.
1. Have you always experienced this behavior with Universal Control, or did this begin recently?
2. If this started recently, were any changes made to your devices or settings before this began?
3. On your iPad, if you go to Settings > Accessibility > Keyboards, is "Full Keyboard Access" on or off?
The above details will help us plan how to proceed.
Please also check out this link, which has information on using Universal Control, and may help: Universal Control: Use a single keyboard and mouse between Mac and iPad
"If you need help
When arranging your displays, if you don't see a display, try these solutions:
- If using macOS Ventura or later, click the add button (+) in the upper-right corner of the Displays settings window, the choose your iPad or other Mac from the menu.
- If using macOS Monterey, click the Add Display button the lower-left corner of the Displays settings window, then choose your iPad or other Mac from the menu.
- Make sure that each device meets the Universal Control system requirements and is using the latest software updates for Mac and software updates for iPad.
- Make sure that your devices are near each other—ideally within 1 meter (3 feet).
- Put your devices to sleep, then wake them up.
- Turn off Universal Control on each device, then restart each device and turn Universal Control back on."
Thanks!