I think this depends on what you’re eating.
Your gut biome has a huge impact on health, mental health and weight. So if you’re accidentally IFing AND eating unhealthy foods, I’d say you’re setting yourself down a bad path. If, however, you’re focusing on eating lean proteins, plenty of veg, nuts and grains, then yay you!
ETA my youngest is now a sophomore in college and he spent his first year missing a lot of meals. Thankfully he’s realized that it was not healthy & didn’t work for him; he feels much better this year since he’s focused on more regular meals and working out regularly.
It’s not really unhealthy at all unless you are eating drastically below maintenance and eating really unhealthy choices. If you’re maintaining your weight then you are fine as far as the former goes. As for the later, if you eating fast food you probably want to make healthier choices and get a good mix of everything, meats/proteins, veggies ect for a good micronutrient balance.
What you are eating matters as much or more than schedule.
Stress also slows down losses, as does lowered sleep….often overlooked
If you are having a noonish snack and then eating at 10…that’s like a 14/10….k8nda low wind fasting and won’t really see much from it