Hey all,
Thank you for all your feedback and voting on this feature.
We recently had a Product Roadmap update, and there has now been an item added to the Roadmap 
:
EDIT: The target date of release supporting Multiple Custom Domains per tenant has been changed, currently the estimated time is set to Q4 2025 (OCT-DEC).
Support Multiple Custom Domains per tenant - Target release in Q3 2024 (Aug-Oct). (Please note that the target dates may be subject to change). We do not have any further details at this time.
Although the release date is quite far out, it is great to see that our product team has added this feature to the future plans. Thanks again for all the feedback that helped get this feature on the roadmap.