Lovely couple. Looks like they enjoyed their time with you.
The WB seems to wander a bit. On my monitor (albeit not calibrated), the first and third pictures appear to have his face a little bit too red. Looks like you nailed the WB on 2 and 4.
The posing is a bit off to me. In 1, 2, and 4, they are not looking lovingly at each other. In two of these, one person is looking at the camera and the other is looking at the partner. I like to see engagement photos where they are visually connecting with each other.
#3 gets them connecting their gazes and her arm positioning is great, but his arms/hands are not finishing the connection. I think that if his right hand was posed to touch her forearm that a stronger bond would have been photographed.
You also got very nice bokeh with the OOF separation on the backgrounds.
Overall, I would bet they will be very pleased with these. I'm probably being picky because that's what I'm working on right now.
Thanks for sharing. I'm trying to improve my couples posing, too.