There is this old chat that suggests writing your own fragment wrapper, but I understand that fragment should now be natively supported. However I couldn't quickly find the correct syntax for it.
Example of what I'm looking for:
<fragment>
<button label="foo"/>
<button label="bar"/>
</fragment>
Here is the official documentation page on reason-react and fragments.
The syntax for using React fragments in reason-react is this:
The terse syntax may be easy to miss if you are looking hard for something like
<Fragment>(this is what happened to me). I first found the answer in the release notes for version 0.5.0