LAN was working perfectly between my two son's Amazon Fire tablets until version 1.21.0.  They both play on the tablet. They are both on the same new version 1.21.0 which updated 6/13/24. Now it either doesn't see the other player or it does and has an issue connecting or it may connect but then disconnects after a couple minutes. There was no issue prior to the update. They are both on the same network. I have rebooted the network, same issues. Nothing else changed except for the update to Minecraft.