How to mount rootfs as read only with qt5-x11 image at boot time?

How to make image with qt5-x11 support and It should be mount as read only at boot time?

Unfortunately, this may not simply be changed at boot time but needs a rootfs specially provisioned for it.

https://www.toradex.com/community/questions/1495/best-pratices-to-create-a-read-only-minimal-system.html

Can you give me some helpful links this is what I already try but It won’t work?
Is it true that with Qt 5 & x11 image can’t be make as read only. And suppose if I use console image with EGLFS buffer then It will able to run graphical qt5 Application?

Can you give me some helpful links

What exactly about the link I gave you above which links to the very Yocto Project manual about the topic wasn’t helpful for you?

this is what I already try but It won’t work?

What exactly is it that you already tried and in which exact way is what exactly not working?

Is it true that with Qt 5 & x11 image can’t be make as read only.

No, more or less anything may be configured/built as read only.

And suppose if I use console image with EGLFS buffer then It will able to run graphical qt5 Application?

No, you will need to build a specific Qt image with resp. graphical backend which has been discussed on this very forum more than once before.

BTW: What exact hardware (module and carrier board) and software versions of things are you talking about?