$3000 is the most that can be deducted against ordinary income, but any amount can be deducted against realized capital gains that you may have.

DJS, are you saying that you can deduct more than $3000 of the carry over loss in a tax year if you had additional net positive capital gains in the current tax year?

If you had a Capital gain during 2020, that gain would be covered by your carryover, and you would still get the -$3,000 on line 7 of your tax return.

Please look at Schedule D.  You will see that your total carryover shows on line 6.  It is adjusted down by the amount of net gain (allocated by long and short term gain) you had and it is posted to line 16.  You will then see the -$3,000 will appear on line 21.  This carries over to line 7 of your 1040.