FYI you should either use a separate device to access it, or use VPN split tunnelling to avoid what data leakage you can (separate device is better though)
I believe Graphebe lets you split tunnelling by app, so all the tracking etc. that can be used against you goes through the VPN.
I would not rely on Reddit not sharing your IP with your government. I would not rely on the ad providers on Reddit not sharing your IP either.
Isolate all Reddit activity and only Reddit activity to that VPN. Make sure they don’t store logs and are reputable.