It's funny, this stuff was normal before smart phones. If you forgot to charge your phone (because you only had to do it every week or so, so you didn't have a routine) then the alarm would still go off even if the battery died in the night.
We have some awesome new things that smart phones give us, but it's not without compromise.
True. I still miss, and I don't know how to display passing seconds on my clock. It was present in Android 11 and now in Android 14 I cannot find anything to have it. Moreover, I loved on OxygenOS "triple fingers" from top to bottom - doing screenshot. I hate doing it through buttons. Same when I have a turned off-screen I could just "draw" with my finger letter V, and it would turn on the Flashlight and the same way turning it off.
Oh I remember those gestures when I had a Oneplus, I think it was a 3T.
For the clock, if I open my clock app and go to the clock screen it shows me the time with seconds. Or are you meaning in the notifications bar or lock screen?
I feel like I need to post a warning before posting these, given the community. These are some google links, but one google support discussion here points to this google play app here that lets you access the hidden system UI tuner to add seconds back. Maybe check it out?
Glad it worked! Yeah it's weird they make you install a third party app to let you launch something built in, especially since they already have an established path for accessing hidden settings.