After applying for a job, they let me train in it, but no offer has been made?

A while ago i applied and interviewed for an internal position at work. After a while they asked me if i wanted to train / help the department doing OT and i agreed. It’s been now over two months of that, but they haven’t said anything about actually making me an offer (They have hired others, but still need more people for the role). If i had to guess i would think that they maybe are not sure that im good fit for the position, but the position seems like the safest at the moment and it would give me experience for future roles.
How can i bring this up to the hiring manager without burning any bridges? I just dont want to put all my eggs in one basket either.

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