Solar panel waste is not something you need to concern yourself with. Even if people are upgrading panels after 10 years this waste is insignificant compared to sooooooooo many things. Recycling materials in solar panels is probably a good idea, but it's not something to stop you getting panels today.
If waste is a concern for you, you should be switching to solar panels since they produce so little waste compared to other energies like coal. Like hundreds of times less. You probably should be caring more about, tires, mattresses, single use plastics, vapes, the packaging everything comes before solar panels.
(This brought to you by ABC fearmongering)