Welcome Alleycat. I think you may have just missed the frog spawn this year. how long have you had your pond? if you have filled your pond with tap water give a few weeks to settle. Do you have friends with a pond? they use to say, take a bucket of pond water, even mud from an established pond to 'start' a new pond off!
All our pond life came in 'on the wind' so to speak. It just seemed to arrive- lovely when that happens and you see your first pond dwellers.
Good luck an keep us posted please.