Not sure if you're still looking, but we’ve created a Tabs macro as part of our toolbox of useful Confluence Cloud macros. It's pretty easy to use and will do both horizontal and vertical tab styles.
Try it here: https://marketplace.atlassian.com/1215202
Keen to know if it helps you out
Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time! We're looking for people to participate in a remote 1-hr workshop...
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