I want to be able to disable NSFW content from showing up when I browse the website. However, when I go to my profile settings, it doesn't allow me to opt-out. The checkbox regarding that content simply does not appear. I have attached a screenshot of that portion of my screen.

However, I do not have NSFW content uploaded. Out of the 3 games/demos/prototypes I have uploaded, none of them contain adult content. In the past, there was NSFW content on this account, but that has been deleted for a long time as I have now divided that content into 2 different accounts with the help of itch.io staff. However, it seems like there is a bug where although the content the removed or adjusted, the account remains unable to change that setting. It is almost like a flag attached to the account  that has not been updated.

Thank you for your time.

Sounds like a bug. I've let an admin know.

To be honest this looks like an oversight on ItchIO’s part because it’s set so that accounts that uploaded any NSFW content at all will be unable to disable the NSFW content view themselves, even if those accounts remove all of the NSFW games that they posted.

I don’t think your problem will be fixed soon because either an admin has to come to manually reset your account status to no NSFW posted, or they have to alter ItchIO inner workings so that accounts that previously uploaded NSFW but no longer has NSFW content will be re-allowed to adjust their NSFW viewing option.

You should just make a different account for viewing SFW stuff on ItchIO.