A lot of memebers here use 4G/5G rotating proxies with no issues, I personally prefer a good rotating residential or static residential proxy. Keyword here is "good". Most proxies are database proxies and will get you shadowbanned almost instantly. It takes some time but if you look around long enough you'll find one that's good enough. To test them use the pixelscan.net test. If it passes it'll be good enough for Reddit.
Before anybody asks I can't give up my personal proxy providers, you can find one if you try.