I'm not sure about specific retsu unohana x oc fanfic titles off the top of my head. However, you could try searching on platforms like FanFiction.net as well. Some fanfic authors may also promote their works on social media platforms like Twitter or Tumblr. You might have to dig a bit to find really good ones, but it's worth the effort if you're interested in this pairing.
There are various places to find retsu unohana x oc fanfic. One option is Archive of Our Own (AO3). You can simply search for 'retsu unohana x oc' on their website, and it will show you a list of available fanfics. Another way is to check some anime - related fanfic forums where fans might share their works on this pairing.
Finding good retsu unohana x oc fanfic can be a bit of a hunt. First, you need to consider what kind of story you're looking for. Are you interested in a romantic story, an adventure story involving the two characters, or something else? Once you know that, you can start your search more effectively. As I mentioned before, AO3 and FanFiction.net are great starting points. Additionally, you can look at the tags and reviews of the fanfics to see if they match your interests. For example, if you want a fluff - filled romantic story, look for tags like 'romance' and 'fluff' and read the reviews to see if other readers thought it was a good story in that regard.
The best chapter pointer here is Chapter 22, "Number 7203". It opens with Hearing this, Su Yinwan looked at Shang Shaojing with a face full of... and closes on Jiang Li's righteousness temporarily shut Jiang Yan up, but after a few....
The best chapter pointer here is Chapter 3, "Madam, the eldest young master has been missing for over half a month". It opens with Qiao was still annoyed at the attitude of this unknown girl when she heard... and closes on Jiang Yan, forced into a marriage with someone he did not love, had....
Chapter 921, "I scored 200 more points than your brother!", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. The chapter turns that into something concrete by moving from [I told you, she's only cut out for second-tier universities at...
A practical answer is Chapter 41, because it turns the idea into a concrete scene. The chapter opens with The live streaming room suddenly boiled over again., adds pressure through When can we finally get on the plane?, and ends on In contrast, Wen Jiaojiao didn't have such awareness..
A practical answer is Chapter 45, because it turns the idea into a concrete scene. The chapter opens with Helplessly, Jiang Yan had no choice but to step on the accelerator., adds pressure through Not one of these three ladies is easy to deal with!], and ends on The guests have to go through so.
The best chapter pointer here is Chapter 39, "Is This Book an Out-of-Print Buddhist Scripture?!". It opens with Qi Tianyu had been looking forward to watching Jiang Li's drama unfold. and closes on His original intention was just to make Jiang Li back off gracefully,....
The best chapter pointer here is Chapter 40, "The National Museum Speaks!". It opens with [Jiang Li claims she copied this herself? and closes on The handsome guys on this show are so difficult to deal with..
A practical answer is Chapter 9, because it turns the idea into a concrete scene. The chapter opens with Exactly, the Qiao Family isn't that great either., adds pressure through Since it was for the Jiang Family's welfare, then as the matriarch, she..., and ends on Qiao, unable to save face.
The best chapter pointer here is Chapter 17, "Madam, the eldest young master has disappeared again". It opens with Jiang Li glanced at Jiang Shixu, who was tense and anxious behind her, and... and closes on I've been a mother for more than ten years but never tasted anything made....