That's the worst way to pick a time that I've seen and used. It requires a lot of swiping, combined with looking for the precise moment to stop the scrolling and not overshoot.
Thankfully in some Android variants it's replaced with much better alternatives. Google Pixel's stock apps in Android 9 and 10 use a round watch face for time points—where you pick first the hour, then the minute with one tap each. However, this still requires rather precise finger work (and has animation in the middle). The best interface IMO is what Pixel and Philips' phones use in the timer: you just type the minute and the second (or the hour and the minute) in four digits, with a huge number pad on the screen. Philips did better here because its pad occupied most of the screen so the tap targets are larger. The benefit of this interface is that you easily develop muscle memory for it, practically no aiming is required.
‘Simple Mobile Tools’ make pretty good apps which are open-source and are present in F-Droid (https://www.simplemobiletools.com). Alas their ‘Simple Clock’ uses scroll spinners in the timer, but perhaps you could ask them to reconsider. I can help with screens from the better interfaces.