I dont even know if he did one

Any photos during construction? Yes this is a problem and a sign of sloppy install, shower floors sloping toward drain is 101 level stuff.

No. No photos. what should we do? can it stay like this?

The tiling looks great!

Call him and ask him how he waterproofed the floor and the walls. Or look at your contract with him. Did he have the inspector sign off on the flood test?

I agree w above comment!

Your photo from here thru this laptop shows tell tale signs of preslope/grading issues. Your drain tells me you likely have a weep hole type build or possibly a divot method.(doubtful of the latter) this means there is likely a pan liner that requires a PERFECT preslope underneath it.

What does the detailed SCOPE in your contract say about flood testing ? whats it say about Tile standards to be met and followed?

If you come to find no Flood test was approved by the plumbing inspector via your permits.?

Best course of action ?

Your best bet is to hire a seperate /different licensed plumber who has the proper flood insurance. Have them install an INFLATEABLE test plug down BELOW the clamp drain riser and fill it up to the curb and leave it (While closely monitoring it.) if after 48 hrs the water level has not dropped. Id say its then up to you to decide to live with it or youll know quickly if it all needs to be torn out.

If no leaks you should continue to see these pools repeat in the same area after each use

ILLSAY IT AGAIN

Homeowners if you dont want to be a statistic get yourself an enforceable contract replete with a Detailed TILE scope. In that scope make sure it references :

"All MFG instructions, TCNA, ANSI., IRC, UPC IAMPO standards are to be met and followed."

get A guarantee in writing and youll have recourse when things fail.

This will send 75% of the prospectable hires running out your door and YES it will cost more than the half price crew. If yoou hired a GC you DOUBLE DANG sure want to get that in writing as MANY NOT ALL GC's sub out based on price and gamble with your money.

You want the tile crew that Puts the TCNA method number they intend to employ into your estimate. The crew that starts the conversation with the TCNA book in hand.

It is always best to hire a Tile contractor thats qualified directly if you have any doubt of your GC.

So, if it doesnt flood, is this something we should just live with and thoroughly wipe thw shower out everytine we use it?

If he screwed up something as basic as slope there are more problems that you can't see until it becomes catastrophic...