you are trying with modern activities thats why, if you dont want to use modern just in activity panel there will be filter option on top click on that and check classic activities
UiPath has introduced two types of studio experiences
Classic
Modern
In your laptop, the modern design has enabled so you have to use click activity inside Application Browser. Also, you can disable it if you don’t need. Ref to below doc on how to disable it
In another computer, the classic design has enabled. So that is why you were able to use the activities directly