Minecraft LAN servers issues?

I’ve been playing Minecraft on my LAN servers and now I want my sister to join my world but when I open it to LAN she can’t see it in the multiplayer section. To make thing stranger when she creates a LAN Minecraft server I can see it in the multiplayer tab and I could join it.

We’re both playing Minecraft Java 1.14 and I have windows 10, she is on Mac OS. I have already tried a direct connect with my IP address but it doesn’t work it just times out or something. Could this be firewall issue? How do you even set up Firewall for Minecraft on Windows 10? I don’t wanna run public Minecraft servers as that’s just too many hassle, just local server for me and my sister.