One great Deku and Ochako fanfiction is 'The Path to Heroes'. It beautifully portrays their relationship development. Another good one is 'Deku and Ochako: Training Days' which focuses on their training together and how it deepens their bond.
There could be. However, it depends on the popularity of the 'ochako' character within the fanfiction community. Some fandoms have a large amount of pregnancy - related fanfiction, while others may not. It's best to explore different fanfiction websites to find out.
Definitely not. Fanfictions labeled as 'lemon' often cross the line of what is considered acceptable in terms of content. Izuku and Ochako are characters from a series that is generally aimed at a wide range of audiences, including children and teens, so such inappropriate fanfictions are not suitable.
In the manga I've followed, Ochako and Izuku haven't shared a kiss. The story mainly focuses on their friendship and superhero development rather than romantic gestures like that.
As of the latest chapters, Izuku and Uraraka have shown some mutual interest and closeness, but it's not a definite romantic pairing yet. It's still evolving in the story.
Often, there are themes related to the support system around her. It could show her friends and family rallying around her during the pregnancy. Also, the anticipation of the new life and how it affects her future plans in the fictional world are common themes.