Where are Spirits #1407-1410?
Those are the Animal Crossing: New Horizons event spirits from early April. Event spirits like that are not gone forever if you miss their event. Eventually, they'll appear in the normal Spirit Board random rotation like anything else. I'm unsure of those specific ones are in the rotation yet, but here's what they are, so look out for them:
1407 - Orville & Wilbur (Support)
1408 - C.J. (Support)
1409 - Flick (Primary/Attack)
1410 - Daisy Mae (Support) SmokeRulz (Expert) - 1 month ago