Depends which League you're looking at?
Birmingham 2018-19...-9 points. They also were charged for breach of a Business Plan in 2019-20. Guilty but no points. 3 year period ending 2017-18 then the Business Plan charge related to 2018-19.
Derby 2021-22 although this went back as far as a 3 season period ending in 2016-17 and beginning in 2014-15, -9 points and 3 more suspended thrashed out..oh and a Business Plan. By rights the League could have pushed for -17.
Reading 2021-22..-6 and a further 6 suspended if Business Plan adhered to. This 2nd -6 is currently under dispute/review. There could be further as the suspended-6 wouldn't serve to offset or mitigate against any other breach, they also had a soft embargo in 2020-21 and maybe since January 2020. For 3 year period ending 2020-21. By rights the breach size was -12.
Sheffield Wednesday...-12 although EFL partially culpable saw it halved.
Varied soft and not so soft embargoes.