ANSWER:

No, it does not.

https://www.assimalhakeem.net/does-wet-dream-spoils-fasting-and-what-is-someone-that-had-a-wet-dream-while-fasting-suppose-to-do-can-the-person-continue-with-the-fasting-2/

Today I am fasting and while I was sleeping and I was thinking of bad things and unfortunately sperm dropped So does it nullifies my fast?

Fasting | September 10, 2019 9:19 pm
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I didn’t fast this Ramadan because I’m on medication for Tuberculosis. After that I couldn’t fast on the day of Arafah as I was on my period, and I might not be able to fast two days of Ashura because it will fall during my upcoming period. I feel very disappointed as I think of this as a very big missed opportunity and not deserving of forgiveness of my previous year’s sins. What should I do?
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I did fast on 9th and 10th of muharram, so my missed fast from ramazan has also been counted ?