Tentative Exchange Calendar appointments not consistently showing on iPhone/Apple Watch

So at work we use Microsoft Exchange and I have my calendar synced with my iPhone and Apple Watch. Normally I would get notifications for upcoming meetings, but it seems as though this week I’ve started to no get notifications for meetings which I’ve only tentatively accepted.
What I can’t figure out is whether that has always been the case and I’ve just never noticed it, but that now that my calendar has become crazy busy it’s more obvious. Or has something changed in Exchange and/or iOS/WatchOS Calendar? Or is it just the Next Up view on my Siri Watchface that the events aren’t listed on.

How can I be sure to show all calendar items?