Cam Hi Cam Heather here I hope you are well. There is quite a lot to unpack here and so I'll go over a short summary of each item, if you would like more detail please do ask questions and we would be delighted to help further.
For the EPMV drop that you are seeing this is largely because when you first joined Ezoic it was in the lead up to Christmas which has the highest ad rates and then we have moved into a much lower ad rate period. This impacts all sites and niches industry wide. This article explains this in more detail: https://www.ezoic.com/why-ad-rates-are-so-low-in-q4-2022-and-q1-2023/
The visitors that you are getting to your site have changed over the time period that you have been with Ezoic if you go to this report you will be able to see the keywords that people were using to get to your site and the rate of decline: https://analytics.ezoic.com/reports/seo/searchConsole and if you take a look at the landing pages report you will be able to see the pages where your readers are no longer coming to your site from: https://analytics.ezoic.com/reports/content/landingPages
There have been a number of Google search updates over the last 6 months and so as a first step to getting traffic back to your site I would recommend working through the SEO analysis report here: https://www.ezoic.com/how-to-do-an-on-page-seo-audit-in-12-steps/
In terms of your time on site the screenshot that you have shared is from Google analytics and looks to only have a couple of weeks worth of higher time on site which has then declined. The way Google analytics measures data is different from Ezoic and so it's difficult for us to be able to understand what is happening within that screengrab.
If we look at the time on site for Ezoic on this report here comparing the data for this month to the data from December when your revenue was at it's highest we can see that the time on site has gone up by 6 seconds from 3.0 minutes to 3.06 minutes. We can also see that the number of pages per visit has increased. https://analytics.ezoic.com/reports/ux/deviceTypeUX