I guess that’s the best you can do. A quick online search showed some breakthroughs in microplastic filtration in recent years, but if it’s all that new then it is unlikely to be used in blood donations. I’d say worth asking at the clinic to at least make it a topic of conversation, the more people ask about it the more urgent it will become.

Getting rid of plastic has been a five year process for me now, bit by bit anything that needed replacement was bought in stainless steel, glass or cotton. Professional kitchen supply stores are a great spot for very cheap (2-5€) utensils in stainless with little bells and whistles to break. For PFAS getting rid of non-stick pans is key. Cast iron is okay, but I love stainless, it’s very non-stick if you just preheat it for a very long time