Other than grabbing the edges or corners of the window and resizing it there are no other options for changing the scaling of the UI. There are no options for changing text size or the size of any of the UI components (sliders, buttons, etc.)
The smallest UI size possible is 1018 x 609. This is limited by how compressed all of buttons and sliders can get.
If you are running on any display with less than 1024x768 resolution you are going to have problems.
In the past I've noticed virtual display software available for Windows that creates a virtually larger display that you can pan around, but I am not specifically familiar with any of it. You might look into that.
However, this all begs the question: in the year 2022 why are you using a PC with less than 1024x768 video resolution?