Hello! My name is Mustafa, and I am an Independent Advisor as well as a long-time Microsoft user. I'm sorry that you are experiencing this issue, and I am hopeful that I will be able to help you find a satisfactory solution.
The solution for this is to go to settings> system> display> scale and layout> and choose the size that is good for you. This will make everything bigger, such as icons, writings, widgets....
If you want to increase only the text size bigger go to settings> Ease of access> display> Make text bigger> and then drag the slider to the size that you prefer.
Please let me know if this doesn't work or if you need further assistance.
Warm Regards,
Mustafa