Stages of opportunity do not appear in Stages detail

Hello community,

I have noticed that when the opportunity is passing through the stages set on the DCM bar, these do not appear (some do not appear at all, some appear, but never the full flow from start to finish; New -> ... -> Satisfied)

Do you know how can I solve this? Or at least, where and how data is added in the Stages detail?

Thank you.

Here are missing stages.

Here there is no stage at all.