What can help lift/perk up my sagging breasts (besides surgery)?

Thingsby
I'm in my mid-20s and have DDs, I inherited the big breasts from my father's side and he and many in his family have large breasts.

I never breastfed or got pregnant, yet the elasticity of my breasts have loosened the larger my boobs got and the more weight I lost. I only noticed the sagging about a year ago when I began to gain weight during the quarantine protocols of Covid-19. I have lost 10 kilograms in the last three months, by fasting, swimming and jogging. But see no improvements in the firming of my breasts.

Besides surgical aid, what can I do to help lift my breasts? What kind of exercises has worked on you or those you know who had a similar problem?

I'd appreciate any advice and sharing of links too.
What can help lift/perk up my sagging breasts (besides surgery)?
What can help lift/perk up my sagging breasts (besides surgery)?
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