If you're not set on analog and want a countertop timer, just get one of these: https://www.thermoworks.com/products/extra-big-loud-timer (though probably on sale soon given the season). It's one of those products that just does exactly what it says on the tin: it's extra big (very easy to operate!) and extra loud (they do mean that one).

Though if you prefer a portable one you can stuff in your pocket they have that too, and it also does just what it says on the tin.