Uff this title is clickbait BS, TL;DR:

• The eggs are Pacific White Skate eggs
• They weren’t “released” from the volcano
• It’s likely they lay them there for the warmth coming from hydrothermal plumes because their habitat is relatively deep at 800-2900 m below sea level

Other articles from ~2023:

• https://www.livescience.com/planet-earth/volcanos/scientists-discover-ancient-underwater-volcano-is-still-active-and-covered-in-up-to-a-million-giant-eggs
• https://www.bbc.co.uk/programmes/p0g24gv4