Question for recruiters, is the interview result day a concrete date or just an approximation?

Hii ppl,

It was a panel of 5 ppl (2 Seniors, the Manager and 2 other ppl who were my age looked like mid 20s to late 20s)

I recently interviewed for a role last week Wednesday (25 FEB), from my point of view it went pretty well, like one of the best interviews I've ever had in last 3 months (And I actually had a lot of skills they needed exception some tools that were unique to their industry which they knew most candidates wouldn't have but can quickly pick-up and get upto speed).

~At the end I asked the panel some questions and the senior or the person leading the panel went on over 15 min detailed tangents to tell me about all the office pain-points and was very open and how they wanted someone to resolve these issues, and they told me:

That they will be interviewing 3 more/other candidates within the week and I can expect results/decisions by Monday (2nd March) which was yesterday...

I've been anxious and stressed about the results even when it was on of my best interviews and some of the panelists seemed impressed, it was a big panel of about 5 people...

But now that Tuesday has gone by I think my chances of getting the job are pretty slim and it really SUCKS(the feeling)!!! And I don't want to reach out again and again and bother the manager who scheduled the interviews...

Am I done? should I keep any more expectations at-all?

I know its pretty common to not send a rejection emails, so I already feel like I'm being ghosted, which is like a rejection itself.

And I know there can be delays in the decision making but heckk...

Idk what to do anymore??!! HELP!

I'm worried this will be another rejection, where they just ghost you and I'll keep waiting and hoping!!