Not sure I fully understand exactly what you are asking for. A little more clarity would be helpful.
If you are wanting to have hidden apps or separate app logins, you can use Secure folder to do this.
If you are prevent others from seeing your screen, you may consider a privacy screen protector that cannot be viewed from an angle.
If you are wanting to prevent certain words, such as profanity, from appearing in things like messages while at work, sorry there's currently no direct way to do that. You could try using do not disturb while at work to prevent notifications from popping up, or you could use the dual messenger feature to set up a separate "work messenger."
Hopefully these are helpful suggestions. Let me know if I have not understood your request.
If you're at work, shouldn't you be working and not TikToking? In any case, who's looking over your shoulder that closely that they can see your screen? Blurring words in any app would be a function for the developer of that particular app. You can apply a color filter over your screen to darken it to make it difficult for others to see. Accessibility/vision enhancements/color filter - choose your color and opacity. This control is also available in the quick panel for quick deployment if you enable it in those same settings. You can also just dim the screen so that only you can see it.
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