Yes as long as the drain has a trap and is vented
The clog is below the point where the toilet and the tub join the drain.
You have to use toilet more
The tub and toilet connect to the same drain at some point. The main drain was plugged but the connection between the toilet and tub was still open. Water seeks it's own level. When the water came up in the toilet, the tub was lower so some of it went there.
A frost proof toilet the trap is located below the frost line
The toilet itself is plugged or the pipe from the toilet to the drain is plugged. It may be that the tub and sink have their own drain pipe that may connect to the main away from the toilet drain. Plunge the toilet or sometimes if you fill a 5 gallon bucket with water and pour it into the toilet as fast as it will take it, that will flush out the line. It is a greater amount of water all at once an forces out what the clog is.
When the toilet is flushed, it creates a sudden change in pressure in the plumbing system. This change in pressure can cause air to be sucked into the drain pipes, leading to the gurgling sound in the tub as the air escapes.
When you flush the toilet, the sudden rush of water can create air bubbles in the plumbing system. These air bubbles can travel through the pipes and escape through the tub drain, causing the gurgling sound.
The drain from the toilet to the main or the main itself is partially clogged or collapsed. There is probably enough room for the sink to drain but the washer puts out so much water all at once it can't get through and backs up into the tub and toilet.
You can use the existing floor drain lines most likely you will have to cut the drain line or add to it to line up with the hole in the shower. tubs have drains on one end while most showers have it in the middle. You can buy a 30" by five foot base from Mustee. Nice product, comes in left or right hand drain.
The drain breather on a tub is called an overflow drain.
Supply lines- Hot and cold water for each sink, bathtub, Jacuzzi tub, and shower. Cold water for each toilet. Drain lines- one for each sink, bathtub, Jacuzzi tub, shower, and toilet.
When your tub gurgles when you flush the toilet, it is likely due to a blockage in the plumbing system. The flushing of the toilet creates a sudden rush of water that can cause air to be sucked in through the tub drain, resulting in the gurgling sound. This can be caused by a clog in the pipes or a venting issue in the plumbing system. It is important to address this issue promptly to prevent further plumbing problems.