Readonly fields in CFL and adding tab in std fiori app for custom fields

Hi,

We have a requirement to add the custom fields in std fiori app using CFL, this has been achieved. Now we want

1. the added custom fields should be readonly , by default it is coming as editable. Can this be possible?

2. Can a new tab be added for the these custom fields on the fiori app? or we can just use Adapt UI to add these CFL fields ?

3. Can we change the name of the "Custom Fields" tab added in the SAP GUI Tcode for the CFL fields?

Thanks

Pooja