Okay, airplane aviator: use the elements “tools of the trade” and “more tools” from Alien Laboratory for the sounds of tools/parts being picked through a used. In Spacedock there are the elements “work tools” (which has a drilling sound and some heavy machinery sounds) and “welding sparks”. The Two-Headed Serpent (The Temple of the Dreamer) has a propeller starting one-shot for when testing the propeller. The Two-Headed Serpent (North Borneo) has a “propeller plane in flight”, which, when turned down, could be useful for testing or just outside on the airfield. It also has a “creaking plane” element.
Mask of Nyarlathotep (Red Line to Australia) has a “plane engine” noise for testing or general background. Add in a little wind, and perhaps a little chatter (the North Borneo set has both) and you’d be set! For music, the Red Line to Australia has a “vintage jazz” music element that sounds like someone has a radio on in the corner, or is playing a record.
For the boxing match, I’d use the Tavern Brawl, but use the “boxing night” element for a start, but then add in the “angry crowd” element from Aria Park protest for the sound of a proper match in a large room or arena. For music, try the “destruction drums” from North Borneo, or if that is not quite right, perhaps some of the Mask of Nyarlathotep music might be better. Peruvian Highlands has a darker, scarier “combat music” while Meeting Erica Carlyle has a “running music” that may suit.
For the lawyer, there’s a couple of possibilities. If they are in a busy law office, using the Mask of Nyarlathotep - Death of a Friend, the mood “Precinct 7a” has a lot of good office sounds (typing, phones ringing, fans running, people talking). For the courtroom, you want one of the sets from the Hell’s Rebels adventure path, the chapter Dance of the Damned, specifically the Silver Council set. There are two moods, “waiting for the council to start” (people chatting), then “council in progress”, which starts with a gavel strike (and there’s also a gavel one-shot) and then has the background music of very soft conversation, coughs, chairs shifting, basically all the noises of a crowd that’s trying to be quiet. If you need “arguments”, I’d use the set “Theater” from the Dragon Heist set, as it has an element called “halfling play” which is word-like sounds that can be played in the background without having to have specific dialogue.
I hope that helps!