I need Siri’s directions to be louder and can’t find a setting to increase the volume

This forum is user to user. No one is going to email you and you posted your email address on a public forum visited by thousands of users around the world, which is very unwise. NEVER post personal information on a public forum.

If you do ever find your way back here, when Siri is speaking directions, adjust the volume up button. You need to do that while Siri is speaking.

You need to open maps, set directions to somewhere and then tap on Audio at the bottom of the screen. That will give you the options to set the volume of driving directions.