It’s important to be adaptable with your training plan and listen to your body. If you miss a workout, avoid the temptation to overtrain and catch up, it’s better to maintain your recovery time.
If you feel energised, consider doing the missed session on a rest day. However, avoid doing two workouts of the same discipline on the same say, eg. a push and pull session or a long run and a tempo run, this can lead to injury and further fatigue.
If you’re still feeling tired, it’s wiser to skip the workout and prioritize rest. Listening to your body will help you stay on track and prevent burnout.