As far as I am aware If you have a valid test result you can apply. Following are the guidelines • Standardise the minimum test scores when combining scores across two sittings, so the minimum score is: no more than 0.5 below the required score for all language domains for IELTS (minimum score for reading, speaking and listening when test combining = 6.5; minimum score for writing when test combining = 6); or no more than half a grade below the required score for all language domains for OET (minimum score for reading, speaking and listening when test combining = C+; minimum score for writing when test combining = C)
Yes you can. But the new updates are going to be effective from January 2023. Wait until that. Keep everything ready and make sure your clubbing score is valid for that time.