I re-started my second town 1 month ago. Been playing the game often and running errands for my villagers. Anything that they ask of me I will do. I have also built several of the PWP that are available from the beginning (campsite, cafe, dream suit, museum 2f, 2 streetlights, 1 fountain, 3 bridges) and attended every single PWP ceremony.
Yet I have not had a single PWP request. I have tried the diving trick, but they just ask me to change their catchphrase/greeting or come up with nicknames for me. I spent 3+ hours doing the resetting trick today, but on average I spend about 1 hour on it each day. When I do this trick on my main town I usually get a request within an hour.