As we know, Joanna played an hour-long unannounced set ahead of the Fleet Foxes concert at The Belasco, Los Angeles, USA, on 22 March 2023. She also returned later in the evening, to accompany Fleet Foxes on one of their songs. The songs she performed were:
Go Long
Bombs Are Whistling
Marie At The Mill
Little Hand
The Air Again
No Wonder
Sawdust & Diamonds
... and later ...
Blue Spotted Tail
The last song is a Robin Pecknold composition that first appeared on Fleet Foxes 2011 album 'Helplessness Blues'
I think and hope that it is a good bet that the five new Joanna songs, shown in bold, will feature on a new album, whenever that may be!
We fans have an appalling record of guessing her song titles ahead of their official release, but I have seen a photograph which might be of an on-stage set-list, so perhaps these five will prove to be more accurate than 'The Diver's Wife', 'Be A Woman', or the infamous 'Barbara'!
For me, Marie At The Mill and The Air Again are the stand-outs at this stage (but Joanna's songs have a habit of creeping up on me slowly, so I expect to be adding to that list in the future).
I will continue this thread by having a look at one of the others, and the efforts that people with better ears than me (or more expensive headphones, or lip-reading abilities, or greater acquaintance with the accents of the American south west) have made in compiling the lyrics.