This isn't a direct answer.
But, you can sync the data from Toggl to any one of your google account calendars. And they can go back. So perhaps the limit there isn't that much of an issue.
There is 24me which doesn't seem to go back befor 2018, and isn't as nice as toggl. e.g. toggl you can add an event while still looking at the calendar.
Google is the ...