Native apps on Android have a better cursor caret width. But for web apps and pwa, the caret width seem to be very thin. Could someone tell me how can I increase the cursor width, if it is even feasible?
You can't change the way the cursor caret looks in a textarea. The most you can do is change the color. https://developer.mozilla.org/en-US/docs/Web/CSS/caret-color.
I suggest you take a look at these links too:
How to control cursor/caret size with CSS
How to adjust the Caret (blinking cursor) size inside searchbar with css
I hope I helped somewhat.