Losing tension when I ride and losing watts and rps

Since I tuned my bike with a new chain, new rear derailer cable and new set of jockey wheels, and I have calibrated with my wahoo kicker. I’m having trouble When I ride I’m losing Iwatts and rpms however my character doesn’t move when I’m riding and it takes a few minutes before watts and rpm and why doesn’t wrench icon appear anymore

Make sure you have ridden the trainer for at least 10 minutes before calibrating. That could be the cause of your rpm/power decrease.