Good question. There are only two possible answers to that, but unless your an Everton insider it's impossible to say which is accurate.
1 - Everton did not miss FFP by £19m, it missed by £250m and was allowed to write off a large portion of that under the FFP rules. As a result, the first possible answer is that a lot of the allowed write off fell into the year ending 2020 so losing that year off the calculation makes less difference than the raw numbers suggest.
2 - Second possibility is that 2023 accounts - which are currently not public and have only being shared with the premier league - are worse than expected. This would likely be a result of falling revenues. I'll link the deloitte money league to this post. Everton currently sit in 30th with just under 200m of revenue - down on the last few years and below such footballing giants as Palace, and even Leeds in the championship. This reduced revenue would have a direct impact on profitability (as costs are highly unlikely to have reduced in line with falling revenues). I think it can be summarised as the Usmanov effect - none of which will be deductible against FFP.
I'd guess that some kind of combination of the two is more likely, where Everton are in a position where the raw losses have reduced, but so have their mitigating arguments so the calculation that makes up the £105m losses over 3 years now contains less write offs under the rules. Until losses are reduced to below the average £35m per season allowed - and losses have been above that for 7 straight years, and a long way over it for most of those year - then there is always going to be a risk.
I hear that the rules are likely to change in line with UEFA though at the end of next season, which makes a lot of the above calculation irrelevant moving forward. I think that the UEFA rules are based on % of revenue dedicated towards wages, transfers and agent fee's (think the cap is 70%). Not that it is good news for Everton, as they are in even more of a difficult situation under those guidelines.
The 27th edition of the Deloitte Football Money League profiles the highest revenue generating clubs in world football over the 2022/23 season.
www2.deloitte.com