RSB:

Mr. Queen

So my mom was watching this one but I don´t remember the main character getting pregnant? Can you elaborate, please?  Thank you!!

These fit some of what you're looking for.

  • Well-Intended Love has a pregnancy arc for quite a few eps until the last when the baby is born (there's only one scene with the parents and baby but it's cute).
  • Chef Hua - the FL is pregnant for several eps until the end (the birth isn't shown), and the ML is very happy/involved.
  • Rebirth for You (FL is pregnant for the last few eps and their daughter is shown in the last scene)
  • Well Dominated Love (the pregnancy is only the last episode, but the ML has the cutest, most excited reaction and is the most involved dad I've seen in a drama. There's an end scene with them and the baby.)

and all of these have the similar plot of the couple separating, FL then learning she's pregnant, and a few years later reuniting with the ML who then becomes involved in raising their child and marries the FL, so there's a tiny bit of pregnancy and a lot of co=parenting.

and sort of but not quite

  • Please Be Married (the lead's couple goes back in time from the future to get his parents together so they end up raising him in the past - the second season ends with the FL pregnant.)
 Feysand:

So my mom was watching this one but I don´t remember the main character getting pregnant? Can you elaborate, please?  Thank you!!

She does get pregnant towards the later episodes.

The Real Has Come- pregnancy/contract marriage

The Real Has Come!

The perfect marriage revenge 2023

One of my favourite Dramas EVER, Goodbye to Goodbye is ALL ABOUT pregnancy