I suffered from anhedonic periods for a long time and I still get them. The feeling is horrible and ugly that I prefer the more painful depressive period over it. The worst thing happens to me is when I suddenly get a chemical drop and be anhedonic and lose every enjoyment.
I've spent many years and I've not find a complete permanent solution but had ways to bring back chemicals even temporarily.
The way I'll say is mental training, I don't know how to describe it, but I got used to anhedonia and my other problems so I could recognize my own patterns and reduce how it hurts me.
Second I tried to do stuff without judging myself about not enjoying, I stopped doing anything and whenever I try I was feeling very bad because I couldn't enjoy but then I simply ignored it, I just did things like playing or watching anime without judging myself, eventually I enjoyed some periods instead of nothing.
Also I went to gym and while its not a real solution and don't work all of the time but it can release hormones and chemicals that distracts you. I used to work out then immediately do stuff I enjoy. I've stayed like this for a long time (more than 6 months) and although it doesn't solve my anhedonia, at least it helped me getting some enjoyment. (I actually joined because I fed up of sudden dropping of chemicals that is very horrible thing similar to mood swing then someone recommended it for the chemicals)
I've still get ups and downs but I completely recognize my pattern and ignore it.
I've got damaged from anhedonia and my other countless problems and I know the horrible feeling. (Tbh anhedonia can even prevent one from ctbing and simply put the nothingness mode)
There are also ways to trigger chemicals but it doesn't happen intentionally so I just ignore the whole thing and it comes, I've developed many ways like enjoying the food or sexual stuff. I've playing the horror genre of video games and it sparked something at least. There are many more ways I developed but not consistent.
I've suffered from anhedonia for years and I can tell you getting chemicals is not impossible but getting them constantly probably is very hard. I was in the same place thinking its impossible but then at least I found some workaround. Even if its temporary, at least it worked to make me escape. I've got hurt and I know how it feels not to be in feelings when you read or watch or play or anything else, but guess what, once you get the chemicals, you can simulate your previous experiences and feel the enjoyment, its better than nothing.
I do not use meds or anything but just got used to it and deal with it. Maybe you can get meds or something because my way is very long one sadly