You can clearly see the rail bridge in the screenshots listed on their website EGPN Dundee Airport - Microsoft Flight Simulator - Orbx but as I only play on xbox I can’t confirm whether they made it into the actual package. Either way, it should really be in the base game. I do have the Scotland/North GB package from them, and while it does have quite a few Dundee landmarks, as you say, it still excludes the bridges.