You can write a custom layout for this, iterate over all children and ask for their min intrinsic width, and take the maximum result of that and force all children to be measured at that width by passing fixed constraints for their width. Then the annoying thing is that you’d need to do the placement yourself 🤔
Now without doing a completely custom layout, maybe you can play with what is being said here
https://developer.android.com/jetpack/compose/layouts/intrinsic-measurements? I don’t know if that’d work inside a FlowRow as-is since I have not used that one myself really.