Went at 8:10 this morning and all was good. Parking within ten rows of front door, i found someone stocking and asked where Sodastream products were. She told me "End cap in main isle" and walked me half way there. The display was neat and orderly with 31 types including Crystal Light Peach Tea. I will also try the raspberry lemonade. Only one of the 31 types was empty, most looked pretty full.
What I learned is that early Monday morning is probably the best time to visit Walmart because they are almost void of shoppers and help is busy restocking after the weekend sales.
Also, FWIW, the young lady that helped me is one of many at many locations that seemed to know exactly where to find Sodastream products. My sense was that she had been asked this question often.