Hi Holy04b,
Re: "managed devices : i just attempted to share accessibility settings and this is what it says :
feature unavailable this setting has been configured by a managed account"
ThanK you for your post to this community. Am no expert in this area, yet your post deserves some response. It seems that the way your account is set-up and managed does not allow you to share accessibility settings as you wish, or to change the settings yourself.
Parents, organizations, or businesses may often take care of settings on managed devices: Each device is set-up differently, so we can not guess which setting(s) would need to be changed : eg: Who you can send messages to may, or may not be, restricted. What you can share may, or may not, be restricted.
You may need to discuss the situation with the person who has set-up your iPhone for you, and who could likely make the setting-changes to allow you to share your accessibility settings.
If greater assistance is needed:
If they, or you, need help with an accessibility setting, they could reach out to Apple's Accessibility team:
See: How to contact Apple for help with accessibility features - Apple Support
All the best :-)