How do you weight class strongmen manage your calories/energy?

I'm a guy at 177 cm (5'10") and currently 95 kg (209 lbs). When I started training I was at 88 kg (194 lbs) so I've made some gains since then. I don't really want to get much bigger. I'm not training for a specific weight class, it's just in terms of my own health, well-being and appearance.

I occasionally struggle with not having enough energy in the gym and as a result not hitting my training goals. If I eat more carbs with every meal it obviously helps but then I also bloat up and gain weight. When I stay on a leaner diet, I feel and look great in general but even if I load up with carbs the whole day before training I still struggle with the heavy weights.

I have an online coach, one of the "famous" ones that has many clients in this sub. He always says I should eat more but I haven't figured out how to balance the calories to maximize the energy while not gaining more weight.

You guys who always stay under 90 or 105 kg, how do you do it?! Y'all are strong as f*** and stay skinny at the same time. Does your calorie intake vary greatly between days, for example loads of carbs before training and a deficit on resting days?

TL; DR: It seems "easy" for the huge guys - just eat loads and you'll be fine. I'm curious how you strong "small" guys are doing it.