FLASH PLAYER

Very likely not since almost everybody has moved on from Flash. Even its creators recommend you remove it since security risks were found.

To uninstall Flash Player on your Mac read this web page -->

https://www.adobe.com/products/flashplayer/end-of-life.html

Click “Uninstall” when prompted by Adobe in Flash Player, or follow these manual uninstall instructions https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html

Even if you want Flash Player on anything, it won't work anymore:

Adobe Flash Player EOL General Information Page - https://www.adobe.com/products/flashplayer/end-of-life.html

"To help secure your system, Adobe blocked Flash content from running in Flash Player beginning January 12, 2021."

Feb 2021 post by MrHoffman explaining Flash Player retirement. - https://discussions.apple.com/thread/252418549?answerId=254561125022#254561125022

Flash Player (assuming you're talking about Adobe Flash) has been deprecated for years now. Honestly, I'm surprised you even have it installed, and can't imagine there's a problem deleting it, unless you have a lot of Flash content you care about.

No, absolutely no problems uninstalling Flash. You should have done it years ago. Any website worth visiting these days stopped using Flash years ago.