Raising your concern to your manager sounds like the best thing to do, but I'd also recommend you to try raising awareness about your contribution to the project or product. Not like bragging, but something like writing in Slack general channel or sending an email to the whole team once you finish a relevant task.
I imagine something like "hey team, I just deployed the feature "x" which will help us in "y" way. Let me know if you need anything, happy coding!".
Hope this helps! Good luck from one backend dev to another 🙂
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