How to make a line chart with points from different tables?

You can (and should) utilize a 'Date Table' for this. 

The two tables are connected through the common date table.

The x axis of your chart is this date table. 

Here is an article on creating and using a date table: 

https://learn.microsoft.com/en-us/power-bi/guidance/model-date-tables 

Once this is setup and connected, you can use a measure to combine both values into a single line. 

Here are the results: 

Here is the measure to combine them into one line: 

Here is the data model (using the 'Date Table' as the common connection: 

Here is a sample of the Date Table (done in excel): 

Here is the sample data (one data point for historical, and multiple for data points for 2022-2023):

Let me know if this works for you.