When typing on Keyboard and Mouse in Minecraft Bedrock for Xbox, You cannot type directly into the game such as in Windows 10, but the game will bring up the on screen Xbox keyboard.

This works just like using a Controller; however, it is frustrating to bring up the on screen keyboard whenever you try to type text. This also prevents the use of using 'Tab' autofill in the Minecraft chat box.

Moreover, the use of Keyboard & Mouse on xbox had worked perfectly, and was able to type text directly into Minecraft but had recently changed maybe 2 Months ago.

Hopefully this helps, and thank you very much!