Yes : for spending an usual P2(W)PKH, the input(/witness) is
<signature (70-72 bytes long)><pubkey (33 or 65 bytes long)>.
Because the locking script (scriptpubkey/witness program) is in this case
OP_DUP OP_HASH160 <pubKeyHash> OP_EQUALVERIFY OP_CHECKSIG
Once having verified that the public key matches the hash in the locking script, there is only OP_CHECKSIG left, which takes <a signature><a public key> and verifies that the signature matches the public key.