1:go to settings --> accessibility
2:change text background opacity to 0
3:and doesn't work
Note: this bug on 1.16 to 1.20.60.24 beta/preview
Edit I copying MCPE-79331 to fix this bug and after 1.19.50.22 reverted this issue without telling Like (Temporarily reverted a change that linked Item Text Background with existing Text Background opacity slider in Accessibility Options) in 1.19.50.22 change log
Please do not intentionally create duplicate reports.