Please help us help you and fill where relevant: Your LimeSurvey version:
LimeSurvey Community Edition
Version 3.27.6+210629 Own server or LimeSurvey hosting: Site Ground Cloud Hosting Survey theme/template:
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I've recently been told by our cloud server providers (siteground.com) that their My SQL database, that our current LimeSurvey configuration sits on, is about to be updated to My SQL 8. Should I be concerned about this? Could there be any likely issues?
You are using a LimeSurvey version which is no longer supporter and maybe also a security risk. It has not been officially tested with that MySQL version, so it might work or not.
Your best bet would be to update to the latest LimeSurvey version, then you should be in the clear.