We have 365 days left with extended support for Exchange 2010 . It is soon coming to an end. After January 14th, 2020, no further technical support or updates will be available. This includes security, bug and time zone updates.
With no direct path to Exchange 2019 from 2010, you need to migrate to either 2013 or 2016. From there you can migrate to 2019 or Office 365.
Please be sure to follow required and recommended requirements and processes for these upgrades. I have seen too many people cut paths short to save time or money and end up in awkward situations that are difficult to get out of.