There are many articles online related to this FileZilla Option: Server->Force showing hidden files
Notice that this option is deprecated (it uses the LIST -a command which is deprecated). On nowadays FTP servers this option has no effect. Modern servers use MLSD command for directory listings. So if the server knows this command, FileZilla (and other FTP clients) will use it by default.
As a client, you can’t tell a server that is using MLSD command to show hidden files.
So, if you can’t see hidden files in your FTP client (files like .htaccess etc.), you should contact your host and ask for help.
Related KB article: Use FileZilla to connect via FTP to your web hosting account