Is there a plugin for creating animated rectangle highlights and annotations?

I was previously using Camtasia to create video guides to demonstrate how to use software for my company. Camtasia has a lot of quick effects that can be easily dragged and dropped onto the timeline.
I found Camtasia very efficient for screen capture and creating video guides for software.

My company then instructed me to use Premiere Pro instead (because they had a company license).
Unfortunately, I cannot achieve the same level of efficiency, especially when it comes to creating rectangle highlights.

The closest I could get was to use the legacy "Write on tool" to draw a rectangle. It is a lot slower because each rectangle has to be created individually and they can't be resized much. The biggest issue is that I can only use this method for drawing small rectangles. The larger rectangles end up turning into dotted lines (see video below).
I did try creating the rectangles in After Effects, but working between the two applications is totally impractical, especially when I am creating dozens of them.

Has anyone come across a plugin that would create this effect efficiently? I am using a PC.

Thanks for any help.