You can buy proxies to use, of varying quality, but they are somewhat expensive depending on what you need. I'll just say that firefox still runs tampermonkey,

You can buy proxies to use, of varying quality, but they are somewhat expensive depending on what you need. I'll just say that firefox still runs tampermonkey, and that includes firefox mobile, so depending on how often you need a different IP and how much data you're getting, you might be able to do away with the whole idea of proxies and just have a few mobile phones that can be configured as workers that take requests through a tampermonkey script. Or that a laptop tethers to that does the same, or that runs puppeteer itself. It depends on whether a worker needs a new IP every few minutes, hours or days as to whether a real mobile phone works (as some manual interaction is often required to actively change the IP).