I’m not blind but I work in web accessibility. A lot of people with low/no sight rely on screen readers to navigate phones and computers. It’s up to devs to develop sites and apps that work nicely with accessibility software, so it depends a lot on the specific interface being used. Generally most things from big tech go through heavy accessibility testing, whereas government websites are seemingly designed to be equally inaccessible to everyone.

Accessibility testing usually involves things like checking that everything is labeled, checking that everything can be accessed via keyboard, checking that visual events are transmitted to the screen reader, checking that things work well with high contrast mode, and so on

Edit: I also want to add that this is one of the reasons people left Reddit. After they banned third party apps, it became unusable to people who relied on accessibility tools. They don’t give a rats ass about making the official app accessible.