TL;DR: This is not currently supported, nor does Beeper have an ETA. 

Are you missing iMessage contacts in the Beeper Android app?

Though this feature is unavailable/unsupported in the Beeper Android app, and Beeper doesn't have an ETA for an update or support, remember that Beeper Support no longer supports the iMessage Bridge.

We are now focusing on supporting the other chat services integrated into Beeper and are no longer troubleshooting iMessage issues.

You can continue using iMessage in Beeper if you like. However, you will have to source your own support via our help article or other communities.

Is there anything else I can help you with regarding your Beeper experience today?

Community and troubleshooting options:

Discord Server

Beeper Reddit (Mods made for iMessage questions)

As a last resort, discontinue the use of iMessage with Beeper. (Removing your iMessage from Beeper is permanent; the connection won’t be available anymore after this.)