At least DW is totally transparent about it. A quick look at their web site gives you that info immediately. The info page about it even figures as one of the top Questions in their FAQ:

"DW is Germany’s international broadcaster. It is organized under public law and funded by the German federal tax budget."

https://corporate.dw.com/en/what-kind-of-company-is-deutsche...

"DW is financed via funding from the state, i.e. from tax revenue. This is in contrast to the domestic public channels, which are funded via broadcasting fees."

https://corporate.dw.com/en/who-finances-deutsche-welle/a-36...