Combining tables for exporting

Hello all, I have an issue that I'm trying to resolve.

Let's say I have two tables

Table 1 has 2 columns

Table 2 has 3 columns and is joined to table 1 by col1 (1:many)

I also have a two tab Power BI report that has the two tables as separate tables, eg, here the report is filtered where col1 = 'b'

I would like to get a second tab which combines both table 1 and table 2 so it can be exported as 1 single file, rather than having to do a separate export for table 1 and table 2?

I tried creating new Merged table of Table 1 and Table 2, but the filter doesn't seem to work, in that the combined table seems to include all the rows, 

I tried copying the filters from the first tab and syncing them but this doesn't seem to work.

Any suggestions I can try?