Can you try asking Autopilot to open a website and type xyz in a text box. I think autopilot will be able to add it.
the issue is likely because the UiPath browser extension is not installed or enabled.
Install the UiPath Web Automation Extension for chrome or edge from Studio - Tools
After installing restart your browser and UiPath Studio.
Once it’s active typing activities should work and elements will be detected properly.
It looks like youre searching in the Activities panel for an Agentic process but the standard Type Into activity is not showing up because your search results are filtered or youre in a specific project type like Cloud and Cross platform
Close the browser and open it again. It’s some temporary issue or project may not be loaded correctly. Studio web has these activities with UiAutomation package.