Steps to Reproduce:
1. Launch Minecraft: Bedrock Edition on a touchscreen device with a keyboard
2. Press play
3. Press create world
4. Press create new world
5. Press create
6. Tap on the screen
7. Press and hold the spacebar 

Observed Results:
Character jumps once.

Expected Results:
Character should continually jump for as long as the spacebar is held.

Note:

This is MCPE-142358 but reopened and updated to follow the template. The example linked in the comment requesting further information 404s. I had already given sufficient information in that issue and the commenter hadn't specified what they had tried, but oh well.

I am partial to using touch controls as my hand dexterity isn't good. I know there are others with conditions who would appreciate this from an accessibility perspective as they use Bedrock Edition for similar purposes.