Allow Back gesture on keyboard option is missing after latest update in Note10+

Where do I find this option now...without is it's been so annoying to use the back gesture while I am typing. Every time i hav to first hide keyboard and then i can go back. Now whenever we use phone we supposed to type something definitely, to find contact or a video or a message rtc. Now everytime i can be doing these 2 or 3 touches just to go back. It's annoying.