Mac Calendar not syncing events that are showing on iPhone

I use Mac Calendar to keep work, gmail, iCloud calendars all in one place.

Recently, however, events added to my work calendar (Exchange) will not consistently show up on my Mac calendar but are present on iPhone and are visible if I use Outlook. I can remove and re-add the account and things will sync but after a couple of days it quits syncing all events. Restarting the computer without add/remove account does nothing. All devices are up-to-date on software, same AppleID logged in.

Devices: MacBook Air on Sequoia 15.4, iPhone iOS 18.3.2

Prior to updating to Sequoia, I never had a problem with calendars for this account syncing across all my devices.