I feel like you are going to ask about this ship, so I decided to preemptively provide information.
DC has gone through two major reboots and a ton of smaller changes to continuity. Some characters are impacted more than others.
The original Jay Garrick is the original star of the first Flash comics. When DC created Barry they eventually retconned Jay's adventures to have happened on another Earth called Earth 2. After Crisis on Infinite Earths Earth 2 was merged with Earth 1 to create New Earth. Jay's adventures were folded into New Earth. Eventually DC created another Earth 2 with another Jay Garrick (with the original one still on New Earth). Then after Flashpoint the original Jay Garrick was trapped in the Speedforce (sort of an alternate dimension). While a third Earth 2 was created with another Jay Garrick who is very distinct from the original Jay. The original Jay is the oldest Flash, happily married and fought in World War II, and got his powers from an experiment. The Post-Flashpoint Earth 2 Jay is a young man, about college aged, who is single and got his powers from the dying god Mercury.
When it comes to Kara there are multiple distinct Kara Zor-Els in DC. There is the original Kara Zor-El who appeared in 1959. During the Crisis on Infinite Earths DC fridged her so that Clark could be special and then erased her very existence from continuity. In 2005 a second Kara Zor-El appeared who shares none of the adventures or relationships with the original. This Kara Zor-El was erased from existence in Flashpoint. The current Kara Zor-El first appeared in the New 52, and again shares no adventures or relationships with the previous two Karas. Finally in the Convergence event a few years ago the death of the original Kara Zor-El was finally undone and she's traveling around the multiverse having adventures.
F!Jay Garrick (Post Flashpoint Earth 2)/Kara Zor-El (Post Flashpoint Prime Earth)
DC has gone through two major reboots and a ton of smaller changes to continuity. Some characters are impacted more than others.
The original Jay Garrick is the original star of the first Flash comics. When DC created Barry they eventually retconned Jay's adventures to have happened on another Earth called Earth 2. After Crisis on Infinite Earths Earth 2 was merged with Earth 1 to create New Earth. Jay's adventures were folded into New Earth. Eventually DC created another Earth 2 with another Jay Garrick (with the original one still on New Earth). Then after Flashpoint the original Jay Garrick was trapped in the Speedforce (sort of an alternate dimension). While a third Earth 2 was created with another Jay Garrick who is very distinct from the original Jay. The original Jay is the oldest Flash, happily married and fought in World War II, and got his powers from an experiment. The Post-Flashpoint Earth 2 Jay is a young man, about college aged, who is single and got his powers from the dying god Mercury.
https://dc.fandom.com/wiki/Jason_Garrick_(New_Earth)
https://dc.fandom.com/wiki/Jason_Garrick_(Earth_2)
When it comes to Kara there are multiple distinct Kara Zor-Els in DC. There is the original Kara Zor-El who appeared in 1959. During the Crisis on Infinite Earths DC fridged her so that Clark could be special and then erased her very existence from continuity. In 2005 a second Kara Zor-El appeared who shares none of the adventures or relationships with the original. This Kara Zor-El was erased from existence in Flashpoint. The current Kara Zor-El first appeared in the New 52, and again shares no adventures or relationships with the previous two Karas. Finally in the Convergence event a few years ago the death of the original Kara Zor-El was finally undone and she's traveling around the multiverse having adventures.
https://dc.fandom.com/wiki/Kara_Zor-El_(Earth-One)
https://dc.fandom.com/wiki/Kara_Zor-El_(New_Earth)
https://dc.fandom.com/wiki/Kara_Zor-El_(Prime_Earth)