Recommendations

Both are directed by the same director. In both the series, ML is the crown prince and FL wants to live peacefully with her family. The costume and makeup have a fanatasy style which is similar in both the dramas.

They have a similar overarching storyline where 1 person takes the other in as a "pet",
but in kimi wa petto, the "pet" is the one that get's cooked for and pampered, where i'm your pet it's more just like an excuse
I'm your pet is BL, kimi wa petto isn't
They both have it where the one person only feels comfortable and able to be themselves with the "pet"

both take place in the 19s and had a tragic ending. both couple met because the FL friend ask them for help (in a different way)

Both are Republican Era dramas, set during the Japanese occupation, with the ML undercover and fighting against them.

Both are Thai BLs about parallel worlds, with one ML crossing over to the other's world.
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Both are BLs with a restaurant setting and a similar vibe between the main couple.
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Both are BLs with a restaurant setting with a uniquely focused menu and a seemingly mismatched couple.
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Both are BLs with a restaurant setting and one of the MLs a chef.
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Both MLs are firefighters and of a lower social class than the wealthy FL with whom they have a past connection.

Both MLs are good-hearted firefighters with a past connection to the FL.
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Both are offbeat and humorous stories of the main characters surviving through a zombie apocalypse, with a unique twist on the genre.

Both are historical dramas with a strong bromance between the MLs who work together to solve strange and complex mystery cases. One of the MLs has a connection to the one responsible for it all. Both are shorter dramas.

Both are historical dramas with a strong bromance between the MLs who work together to solve strange and complex mystery cases. One of the MLs is a talented cook.

Club Sapan Fine Season 2 Episode 2 (Odd-Numbered Love) and My Mate Match both have a love triangle plot and are Thai BL (gay romance) dramas. Both have humour and seriousness to them. Definitely worth watching one if you liked the other.

Adapted from the a webtoon created by the same author, Kang Full. Both shows are the latest drama adaptation of his previous works.