How can I use my spouse’s approval for my application?

No, you cannot use your spouse's I-829 approval. The agency, USCIS, may have certain information on you that may even prevent the approval of your I-485. Your I-485 application will be considered on its own merit.

Form I-829 cannot replace your pending I-485. It is used to remove conditions from permanent resident status that has already been granted, so it would not be the appropriate filing while your I-485 remains pending and you have not obtained conditional permanent resident status.
Your spouse’s I-829 approval may, however, support a request for you to receive permanent resident status without conditions when your I-485 is approved. In materials from its December 16, 2010 EB-5 stakeholder
engagement, USCIS indicated that a qualifying derivative whose principal applicant’s conditions had already been removed should receive permanent resident status without conditions. Because these are historical
stakeholder meeting materials, their applicability under current USCIS policy and to your particular circumstances should be confirmed before relying on them.
An immigration attorney should review your immigration records, your spouse’s approval notices, and current applicable guidance to determine the appropriate approach. Your spouse’s I-829 approval does not automatically resolve your I-485 or establish that you meet all adjustment-of-status requirements. Given the prolonged delay, that review should also consider available options for seeking adjudication.
This is general information based on the facts provided. A case-specific recommendation would require review of the relevant records.