Honestly, fasting for over that short period of time (1-2 days) will do very little in terms of what IF does. Technically fasting in the way you are describing isn’t really even IF, it’s just a 24 hour fast.
I’m an experienced IF’er, mostly on a 17/7 cycle and do it pretty much all year, except peak summer riding/running and the holidays. I also eat lower carbs on days I am not on the bike or running and add in more carbs loading into big days on the bike. Overall I’m pretty loose with what I eat during my eating window but always choose whole natural foods, but the occasional treat does come in.
I also have done multiple 24-72 hour fasts (not IF). But those experiences are very different. Especially if you have never fasted for a significant period of time.
With a short fast, that you are describing, it will be hard. You’ll struggle with hunger and energy. However you probably will noticed improved mental focus and sleep. Whenever I’ve done fasting I always get both, even the first few times I’ve done it. Physically and training wise I can see almost no benefits, beyond maybe a reset for your system.
Read about and pay attention to what you break your fast with. I get massive digestive issues if I break my fast with pure fat. I’ve found bone broth to be the best, for fasting and IF, especially one with apple cider vinegar in it. I usually wait 30-60mins after bone broth before I have a meal.
But… If you are coming off a heavy week of training… I’f not fast at all. I’d focus on sleep, rest and proper nutrition. Eating clean and whole food will give you far more benefit into the next week of training.