My goal physique changes, unfortunately.

Set goals which aren't body-based. Add 20kg to your bench. Try and do a pistol squat. Run a 10k. Enter a competition of some variety.

I think these are healthier goals anyway.

You can look into some performance goals. Do you want to train for a marathon or Ironman? Do you want to compete in powerlifting? Or maybe take up a team sport? These can all give you goals and targets to keep you moving.

When I started lifting, I was in my early 20s, when I had similar goals as you and a tremendous amount of free time.

By the time I hit my “target”, life started getting busy and my free time was replaced by various obligations.

For me, the desire to continue lifting shifted from a goal body to having an hour a day that was 100% mine. Maybe that could work for you as well.

The ever-present fear of losing all your progress also helps.