How can VoiceOver users activate links after the first one, in a message with multiple interactive items?
I've found one way, but it's not great:

Tap or swipe to select the message containing multiple links
Do a two-finger rotate gesture until the rotar says &quot;Links&quot;. For me one rotation left (anti-clockwise) from the default position seems to usually reach Links
Swipe down repeatedly until the desired link is selected. It'll now go through each interactable item in the message (not just links), so in this message it'll select the number then select the link
Double-tap the screen while the link is active to activate it