Hi @bharathkumarkoya and @chatumoh ,
First off sorry @chatumoh for not getting back to you. I was OOO for a while and this slipped through the cracks.
But I have good news: the engineering team is currently working on several improvements in this area that will be included in the next release for both the solace-spring-boot and solace-sping-cloud offerings. This will include oauth token refresh. You can see the work is already underway on the Spring Boot side with the PR below being opened today. More things are being worked, including ensuring the Cloud Stream binder supports OAuth with multiple binders at once. I would expect these releases happen in August. They could even sneak into late July so keep your eyes out for the next release 
You can see the PR here:
Hope that helps!