Missed calls and texts status?

I just had a similar situation to this thread, where I didn’t receive a call (luckily a voicemail was left), the call did not appear in missed calls (but T-Mobile’s visual voicemail app notified me), and a text message took around 40 minutes to arrive from the time it was texted.
I haven’t had many situations like this, but they have occurred before. Is this issue continuing to be looked at? I feel like this is the most privacy focused solution out there and the roadmap for 2021 has me very hopeful, but I can’t have situations where someone is trying to get in contact and can’t.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone