Enter inline math on mobile

Using the web app on my Android phone, I cannot figure out how to enter inline math.

On desktop, I can either use Ctrl + Shift + M, or just type the TeX code, select it, then click Math in the tooltip that appears. On mobile, I cannot do Ctrl of course, and the tooltip that appears when I select does not have a Math option.

However, I can edit existing inline math blocks, so I suspect it's just not exposed in the UI yet.