As shown, there's no need to aim at the side of the block, and blocks can be placed when the aim is about 45° diagonally below.
This has nothing to do with the control method. Whether using touch screens, keyboards & mouses, or controllers and Split controls is on or off, it's able to place blocks in this way.
For example, if using the controller:
The Controller Hint shown means blocks can be placed. ("放置" means "Place" in Chinese)
(The button to Use Item/Place Block has been changed from LT to RT by the player who taking the screenshot)
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[Mod] OcelotOnesie
Thank you for your report!
We're tracking this issue in MCPE-119068, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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