From what I've read enlarged spleen could be caused by anything from an infection to leukemia or lymphoma. An infection is probably far more likely but I'd want to get it checked out just to be on the safe side.
I agree with twinkletoes_12. I'd also want further investigation. That they aren't really too concerned seems a little odd. I'd want to know the reason why it was enlarged. Agree with twinkletos that it can be a number of things and some far less worrisome than others. Even stress can cause an enlarged spleen. Here's a quote: Stress appears to prompt the release of stem cells from the bone marrow to the spleen, where they develop into white blood cells, or monocytes, and expand over time,” Godbout said. “Then the spleen becomes a reservoir of inflammatory cells. https://news.osu.edu/study-reveals-role-of-spleen-in-prolonged-anxiety-after-stress/ But an enlarged spleen can have side effects to your body (platelet and red blood cell production, etc.) but may not have any symptoms. Silent in nature. I'd want to know what was making it enlarged as that may need to be treated. And I wouldn't want the repercussions of enlargement. So, start with the video call, ask all your questions and then demand follow up if not satisfied! https://www.healthline.com/health/splenomegaly#causes