Yammer Community Azure synapse link (Not able to join because of geo location change)

We are not able to join my yammer communities in Viva Engage.

Earlier I was using this group / community for all communicates related to Azure synapse link under Dynamic 365. If I access this link now it redirects me to my internal official communities.

This is because we migrated from US to EU Geo location for Viva Engage. I don't think I can join using my work account now because of this geo change.

Yammer community links are mentioned below

https://www.yammer.com/dynamicsaxfeedbackprograms/#/threads/inGroup?type=in_group&feedId=14868684800

https://www.yammer.com/dynamicsaxfeedbackprograms/groups/32768909312

If I try using my personal account with sign up option, I am redirected to this page saying "Check your mail to complete registration" but I don't receive any mail.

If I try to login option using personal account I am not able to do so since sign in is only possible using work account ? Find below the error.

Can you let me know how can I join this community ? and I can then using which account ? 

Thank you