they were events of kind: 33888

new pinstr is using events of kind: 33889

so you can query relays for your old pins with proper filters if you want.

but you can't view them on new pinstr as I mentioned before.

nostr:note12h5xenwkwdvax5qd3524r7nplct2tuct7y3h0c3nchqfgpmxzncsczndrp