On ipadpro with all latest app update  & ipados18, and ikea/sonos speakers, there are airplay issues as follows (after deleting and re-installing app and new setup process with speakers which did not fix issues):

• the within sonos app radio all work ok
• Roon works ok, despite issues with other apps.
• all non roon and non sonos apps when selecting the sonos speakers, they seem to connect for about 30 seconds then disconnect with nil sound.

so, there is an issue with the intersection of airplay, sonos device or app, and latest apps or ios18.  Using latest sonos app, not legacy. Had previously all worked Ok