Emperor or General (2021)

Both are mini dramas with a modern day FL who time travels to the past and falls in love.
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Both are mini dramas with a main couple who meets and falls in love because of one of them time traveling to the other's time (but reversed in that EoG features a modern day character to the past, MYG is a historical character coming to present day). Both have the time traveler return to their own time, but meeting a doppelganger or possibly even the ML (it's ambiguous) in the present day,

Both mini dramas have a modern day FL who finds herself in the past where she becomes involved with the ML.

Both have emperor characters (ML vs. SML), the couple meeting due to time travel with the FL from modern day and the ML from the past, and are mini dramas in which the ML's double (or maybe the ML, it's ambiguous) appears in the present day at the ending.

Both are mini dramas with a modern day FL who finds herself in history.
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Both are short and sweet dramas about a modern day FL traveling to the past and falling in love with the historical ML. Eventually she returns to her time and meets a double of the ML at the end.

One of the couple is historical, the other modern day and they fall in love due to time travel.
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Both are mini dramas in which the FL time travels from the present to the past and ends up married by an emperor's decree to the ML who is a general.

Both are time travel romances with one half of the couple from the past, the other from present day. Both MLs are connected to the palace but are not royal.

Both are short, mostly light dramas in which a modern day person travels to the past and falls in love with a historical person.

Both are relatively short dramas about a modern day FL ending up in the past, meeting a soldier/general, and falling in love with him.

Modern day FL travels to the past and falls in love with a general.
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Both are fluffy, sweet dramas about the FL ending up in a historical era, meeting, marrying, and falling in love with the ML.

Modern day FL finds herself in the past, meets and falls in love with the ML. Both are short fluffy dramas.

Both are mini dramas with a modern day FL who is magically transported to historical times where she meets and falls in love with the ML.