I’ve been thinking of this
My Little Pony: Friendship is Magic - All Grown Up
The story revolves in the future life of Mane 6 as adults, some of whom are already married and having foals. It’s set roughly 7-8 years after Season 7
Twilight is not yet married, but she’s now the new leader of Equestria alongside Cadance. Celestia and Luna looks more older, and has retired from royal duties. Despite this, she’s now in relationship with Flash.
Pinkie is married to Cheese and both are having a drastic change of personality, now becoming a mature sweet-talking couple rather than hyperactive party-loving ponies. The couple also build their own bakery next to Sugarcube and having two playful foals; one colt and one filly.
Rainbow Dash is married to Soarin’ and both are new leaders of the Wonderbolts.
Flurry Heart is now a 8-year-old filly and attends Ponyville Schoolhouse, having lots of friends
Spike has transformed into a deep-voiced stallion unicorn and is married to Rarity. They has yet to make foals, but Rarity still works at her boutique, which is now larger and more luxurious. Spike is now also a Royal Guard.
Fluttershy and Applejack are not yet married, but still working in their respective homeplaces. Big Mac in the other hand, already married Sugar Belle and now having a 1-year-old filly
CMCs and their Schoolhouse friends are in the same age as original Mane 6, but still maintain their clubhouse and help younger ponies like in the past
Starlight married Sunburst and having a 4-year-old unicorn filly who is a powerful magical prodigy, even able to do extreme spells like her mom did in Every Little Thing She Does.
Starlight’s old village is now built into a more modern town looking like Ponyville, with most of its inhabitants are now married including Sugar Belle.
The Pie Family now living in modern lifestyle in Ponyville, with the Maud, Limestone, and Marble now having a more “youthful” appearances with different hairstyles.
Granny Smith and Grand Pear survives, and the two lives peacefully in a new house somewhere in Ponyville.
There are now technology in Equestria, including mobile phones, automotive, computer, Internet, and much more