I noticed that Agenda allows you to change your font, but it’s a really short list, and all of the included sans serif fonts have the same legibility problem that the default Apple system fonts do - it’s very difficult to distinguish between homoglyphs, such as lowercase l and uppercase I.
This is a huge issue both for cybersecurity as well as for people with visual difficulties.
Would it be possible to get a couple of sans serif fonts that address this issue added to the font selection? For example, Atkinson Hyperlegible is an award winning font available for free from Google Fonts under the SIL Open Font License, which allows bundling in commercial products.