>>936031463
I use this one for pony/sdxl checkpoints
https://civitai.com/models/402667/age-slider-lora-or-ponyxl-sdxl

and this one for Illustirous
https://civitai.com/models/1025710/age-slider-lora-or-illustrious-xl

the former seems to work on a lot of Illustrious models too, it just depends on the model really. no harm in having them both.