Do Wifi calls deduct plan minutes for legacy post-paid plans?

I would like an official T-mobile rep to provide an answer to my specific situation:  Wifi calling with legacy post-paid plans.  I think the confusion is due to (a) pre-paid plans vs. post-paid plans, and (b) legacy post-paid plans (where there are limits to plan voice minutes) and current post-paid plans (where voice is unlimited).

Here's my situation:  I have a legacy Value Family 1000 shared minutes plan, which is a post-paid plan.  If we go over 1000 minutes, we will be charge.  As part of this plan, the following types of calls do not deduct minutes from my plan:

1.  T-mobile to t-mobile

2.  Weekends and evenings

So, if I make calls on weekday during the day to non-t-mobile numbers, these minutes do get deducted from my plan's 1000 minutes.

Here's my question:  In my specific Value Family 1000 legacy plan, if I make a wifi call on a weekday during the day to a non-t-mobile number, will these minutes get deducted from my plan's 1000 minutes?

Here's the problem:  According to the following article:   Wi-Fi Calling FAQs  in the section "How are calls and messages over Wi-Fi Calling billed?" the first bullet point states  explicitly:  "Calls made from the US to US numbers use plan minutes."  However, what's not clear is whether the article applies to (a) Pre-paid plans only (b) Post-paid plans only or (b) Both pre-paid and post-paid plans.  To add the to confusion, I've seen multiple articles state that wifi calling deducts plan minutes, and just as many articles state wifi calling does not deduct plan minutes.   When these contradictory articles are posted, they either (a) Don't make it clear whether they're talking about pre-paid or post-paid plans, (b) Don't make it clear whether they're talking about legacy post-paid plans, where minutes deducted from your plan matter, or current post-paid plans where minutes are unlimited so it doesn't matter whether they get deducted, or (c) They're not from a T-mobile representative, so statements made in the article are of questionable credibility.

So, can someone from T-mobile please clarify my specific plan and the specific situation I described, and let me know if these minutes get deducted from my plan's 1000 minutes?

Thank you.