Hello Aspirant,

See if the criteria for 75% would get restored then you will not be allowed to appear until and unless any relaxation would be provided so at this moment of time it is quite difficult to say anything about JEE 2023. However you can improve your marks through any recognized open board for safer side and keep it above 75% so that if the criteria gets restored then also you can appear for JEE-Advance 2023 upon qualifying JEE-Main 2023.

Also note that  maximum attempts allowed for JEE-Advance is 2 in 2 consecutive years, first attempt in the passing year of class 12th or equivalent examination and second attempt in very next year to that. Similarly for JEE-Main maximum attempts allowed for JEE-Main is 3 in 3 consecutive years, first attempt in the passing year of class 12th or equivalent examination and second attempt in very next year to that followed by third attempt in third year.

For more details kindly check out the links given below :-

JEE Advanced Eligibility Criteria 2022 - Check Age Limit, Domicile, Average Marks (careers360.com)

JEE Main Eligibility Criteria 2022 (Released) - Check Age Limit, Qualifying Marks, Number of Attempts (careers360.com)

I hope this information helps you.

Good Luck!!