A dark background behind the text can definitely help to a degree, and many games include that as an accessibility option!

Certain numbers in the font used for status durations are a bit difficult to differentiate for people with visual dyslexia (3 and 8, 1 and 7, 5 and 6, etc) but even a darker background for the text can help a bit with differentiating the shapes. Below is a screenshot showing one status on a bright background and one status on a dark background in the same image.



Aside from providing a dark background for certain text, many games include other accessibility options for difficult-to-read text such as a dyslexia-friendly font or visual indicators/progress bars for specific numbers.

FFXIV already does this often when it comes to job gauges, where both in the default and simple modes there are bright clear numbers (often with dark backgrounds) and large visible progress bars for important job information (pictured below).