https://civitai.com/models/158272/age-slider-lora-for-anime

Age Slider LoRA (for anime) Simple slider LoRA for modifying the age of a woman. Meant for anime checkpoints (untested on realistic models and boys).

How to use LoRA in A1111: Copy the .safetensors file to stable-diffusion-webui/models/lora

Add to your prompt (or use a plugin)

Replace xxx with the weights (recommended from -4 to 4, older when positive, younger when negative)