@SteveM363 is right, an entity is not created for a button, because the button press itself is treated as an event.
I found that the best solution was to manage the button press events in NodeRed and I got the idea from jimford in this post:
Sonoff zigbee button SNZB-01 issue (only in cloud mode)?
And if you’re interested, here is a stripped back version of my NodeRed button management flow for my 8x SN-ZB01 buttons:
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