Heavy weights, progressive overload. Be aware that muscle aches aren't necessarily a signal that you're working hard enough to induce growth because after a while of doing a certain movement the 'DOMS' (delayed onset muscle soreness) will stop anyway.
I second hip thrusts, increasing the weight each time you do it. Split squats, weighted lunges, step ups, and you can use slow reps and paused reps on all of these. Glute extensions are good but hard to do at home really.
Don't go overboard and train every day, your body needs time to repair and therefore grow muscle. Rest is important, especially when you get up in the heavy ranges. As an example I hip thrust 120kg for 12 reps with pauses and I weight 56kg so the glutes are very strong and as you progress will need more and more stimulus to grow.
Also beware many fitness influencers have awful advice and poor form, they're just genetically gifted, so find reputable ones. Don't just follow the ones with big round butts!
Squats are great but to really engage the glutes you must get below parallel which can be tough if you have limited mobility. Raising your heels help with depth and be mindful or pushing the knees out rather than allowing them to cave inwards.
As PP have said, eat a surplus of calories but not a huge amount, depending on the amount you actually train. You're starting from a better position than people like me who had a big fat butt and have lost weight and are trying to build enough muscle to fill up the skin!