Hybrid 2 days in office but business travel doesn’t count as in office

Just wondering if this is normal. I recently started a new job that requires two days in office. Totally fine; however, they’re asking me to fly out for a few company events on and off over the next 3 month. the 3+ days (including weekend work) will not be considered part of my in office time

So for instance

If my flight is wed and I will be on site for the event Thursday and Friday I’m still required to come in two other days to the main branch

Is this normal?