Help Bitcoin Public Key Why can't I convert the taproot public key through the private key?

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include

include

include

include

int main() {

secp256k1_context *ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);

unsigned char privkey[32] = {
    0x7d, 0x48, 0x1e, 0x43, 0x55, 0xd5, 0x1c, 0x82,
    0x4e, 0x8d, 0x02, 0xe6, 0x17, 0xd0, 0xe1, 0x88,
    0xba, 0x97, 0x68, 0x5e, 0x55, 0xf8, 0x65, 0x57,
    0xd1, 0xd8, 0x3d, 0x64, 0xd1, 0xc8, 0x95, 0x4b
};

if (!secp256k1_ec_seckey_verify(ctx, privkey)) {
    printf("Invalid private key\n");
    secp256k1_context_destroy(ctx);
    return 1;
}

secp256k1_pubkey pubkey;

if (!secp256k1_ec_pubkey_create(ctx, &pubkey, privkey)) {
    printf("Failed to create public key\n");
    secp256k1_context_destroy(ctx);
    return 1;
}

secp256k1_xonly_pubkey xonly_pubkey;
if (!secp256k1_xonly_pubkey_from_pubkey(ctx, &xonly_pubkey, NULL, &pubkey)) {
    printf("Failed to convert to x-only public key\n");
    secp256k1_context_destroy(ctx);
    return 1;
}

unsigned char output[32];
if (!secp256k1_xonly_pubkey_serialize(ctx, output, &xonly_pubkey)) {
    printf("Failed to serialize x-only public key\n");
    secp256k1_context_destroy(ctx);
    return 1;
}

printf("Taproot public key (x-only): ");
for (size_t i = 0; i < 32; i++) {
    printf("%02x", output[i]);
}
printf("\n");

secp256k1_context_destroy(ctx);

return 0;

}

I need t2pr public key

I need an example, can anyone help me?

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Such a conversion is wrong taproot public key