You mean like the Brenner Base [Rail] Tunnel which will connect Austria and Italy?

Germany seems to be stuck at the "studying" stage before they improve the relevant rail links on the Grafing–Rosenheim–Kufstein route.

https://en.wikipedia.org/wiki/Brenner_Base_Tunnel

It's not really clear, the German part was going slower than the tunnel, but now that the tunnel is also delayed by at least 2 years, who knows maybe they are in sync again ;). The road link seems to be going much faster than the rail link on the German sinde, which won't be done before 2032.