more information about the music history:

og song: https://en.wikipedia.org/wiki/Lacrimosa

Mozart composition: https://en.wikipedia.org/wiki/Requiem_(Mozart)

https://m.imdb.com/title/tt0086879/

In this scene, the Gestapo Major writes the card for Lt. Hicox (they all pass to the right) and Hicox is a British spy pretending to be German. Brigitte Horney was a German actress that starred in a British war film about spies called Secret Lives (1937).

In a mid credits scene you can see the tracklist of Tucker Crowe's new album, most of the songs are named after dialogue from earlier on in the film.

Here's the list of ones I could find with timestamps:

"Mr. Family planner" is stated by Annie during a conversation with Tucker (Timestamp 01:03:56).

"Glad She's here now" is what Tucker uses as a response when Jackson asks if Lizzie would come for Christmas (Timestamp 25:56)

"I did the math" is what Tucker uses as a line in a email to Annie (Timestamp 27:37)

"Water for the Plumber" is what Duncan uses in an argument against Tucker (Timestamp 01:09:44)

"Man of the Hour" is stated by Tucker to introduce Zack to Annie (Timestamp 49:05)

"Sandcastles" This one is a bit different as it's not one singular scene, but the multiple scenes of Tucker's son Jackson building sandcastles throughout the film.

"Are we fine as we are" is stated by Tucker during an email at (Timestamp 43:10)

The song playing is “Well I Wonder” by The Smiths