Under Section 97 of the Code of Civil Procedure (CPC), if a party does not appeal against a preliminary decree, they are strictly barred from challenging its correctness in an appeal against the final decree

2) you must file first appeal at the earliest against preliminary decree 

your lawyer must file an application under Order 41 Rule 5 of the CPC asking for an interim stay on the Final Decree Proceedings (FDP).

You can very well file an appeal against the aggrieved judgment before the appellate court. 

You should file it immediately before the final decree is passed. 

You can even file an  IA in the appeal seeking stay of the proceedings before the trial court till the disposal of the appeal. 

Yes. If what has been passed is a preliminary decree, you are entitled to challenge it before the competent appellate court without waiting for the final decree proceedings to conclude. A preliminary decree conclusively determines the rights and shares of the parties, and if you are aggrieved by those findings, the proper course is to file a First Appeal under Section 96 of the Code of Civil Procedure, 1908 within the prescribed period of limitation.

The fact that the final decree proceedings are fixed for 30 July 2026 does not prevent you from filing an appeal against the preliminary decree. In fact, if you wish to prevent further proceedings pursuant to the preliminary decree, you should also consider filing an application for stay of the final decree proceedings before the appellate court or the trial court, as appropriate.

However, if the judgment has been pronounced but the preliminary decree has not yet been formally drawn up, you should first obtain the certified copies of the judgment and decree and then proceed with the appeal.

Therefore, if the findings recorded in the preliminary decree are adverse to you, it is advisable to challenge them promptly rather than waiting for the final decree, as failure to do so may prejudice your rights at a later stage.

Yes you can certainly challenge the same under order 41 CPC within 90 days to HC and within 30 days before district court