Hi @niallleona39330
Try using the tablet's WiFi (or BT) as close as possible to your phone's WiFi (or BT) i.e. <10cm and check if the tablet detects and connects OK and that the connection remains stable.
If it does then it could be an antenna problem.
Here's a teardown [https://www.youtube.com/watch?v=E2VBZjX6Lzk|video] that may help to check if the antenna connections are OK or not.
Looking at the video it appears that there are two antennae in the tablet. The antenna cables can be seen being disconnected from the motherboard at 4:40 and 4:54 minutes respectively, into the video.
Take heed of the comment below the video regarding how not to remove the display assembly. Not that you should have to do this