I think it depends to some extent on your geographic location and what kind of film you're looking for.
There's far less choice than 20 years ago. But more choice than 5 years ago.
Kodak are the main company actually manufacturing colour negative film and they seem to have sorted our their supply/demand problems. There now seems adequate supply of their consumer and pro C41 films. They also coat the Fuji branded 200 and 400 consumer films currently on the market and the Lomography 100, 400 and 800 C41 films. And they brought back Ektachrome 100. They also still offer Tri-X, TMAX 100, TMAX 400 and TMAX 3200 B&W films. Though these are more expensive than other brands in most locations.
FujiFilm are still making a lot of Instax and slide film. They don't appear to be manufacturing C41 film at the moment and it is unclear as to whether they'll resume. Some self appointed experts (and some dealers) like to trash Fuji but the basic fact is that Japanese corporate culture means they're not as open as Kodak. For B&W there's ACROS II which has some involvement from Harman (manufacturers of Ilford films).
Ilford still make everything they made 5 years ago and have added Ortho 80 in 35mm. So that's PanF, FP4+, HP5+, Ortho 80, Delta 100, Delta 400, Delta 3200, XP2 Super. These are usually significantly cheaper than Kodak's B&W films in most locations. The same company that makes Ilford films (Harman Technology) also makes the more budget conscious Kentmere 100 and 400 films. And the big news is that Harman recently added Phoenix 200 C41 colour film - though it is an experimental work in progress and doesn't always act like "normal" C41 film.
Foma are still offering Fomapan 100, 200 and 400 along with Ortho 400. These are cheaper than the bigger players' films and in general not quite as good but are used by many people (including myself) with success. Fomapan 200 is a bit more of a modern type of formulation while the others are traditional B&W films.
Film Ferrania has begun to rise from the ashes of the old Ferrania company and are currently offering P30 and P33 B&W films (80 and 160 ISO)
Other smaller companies such as Adox offer various films, Adox mostly coat their films themselves and are another small company absolutely committed to analogue photography.
And you'll find a number of companies offering Kodak motion picture film in 35mm cassettes, such as CIne Still and Candido. These can be of use, especially as Kodak Vision 3 500T makes a good tungsten balanced 800 speed colour negative film. THere are also various small companies repurposing Agfa aerial film as B&W camera film. There's nothing wrong with this film at all but be aware that some companies make out that it's a special product unique to them and charge a premium for exactly the same film as someone else.
Most of these films are also available in 120 too. Ilford/Kentmere/Harman - all products are in 135 and 120. Kodak offer their B&W, professional colour and Gold 200 in 120. The Lomography C41 120 films are almost certainly closely related to 90s Kodacolor. Fuji still offers their E6 film in 120 and ACROS II. Foma offers everything in 120. Ferrania have started P30 and possibly P33 in 120. Adox had some issues but I think they're able to offer 120 again.
Have I missed anyone?
I took a hiatus from film photography from 2007-2014 and was shocked at what happened to the film market in that time. But things are getting better. Hopefully prices have stabilised particularly as Kodak have increased production. The pandemic obviously caused a lot of problems for many industries not limited to the chemical and shipping industries which really affected film production and distribution.