If I put NEXO up as collateral in my account, do I still receive dividends on it while repaying the loan?

Outdated or Irrelevant

Yes, you will receive dividends on all NEXO Tokens held in your Nexo account. To learn more about Nexo dividends: https://medium.com/nexo/nexo-dividends-explained-6636804db3a.

In other words – it does not matter in which wallet Credit Line or Savings you hold your NEXO Tokens.