I wouldn’t even say they’re situational ironies. Irony is specifically when something is the opposite of what you expect. If someone says they have a fear of public speaking, that sets you up to expect that they would have a very private career. If they then told you that they were a professor for a Freshman class of 200 students, that would be ironic.

A fly in your chardonnay is not opposite to any expectations because the simple act of having a glass of chardonnay doesn’t set up any expectations. You’re not actively expecting there not to be a fly, so if a fly shows up, it’s simply unexpected. And unexpected and ironic are the same.