Thank you for your response, but i am still on the same thing.
in log
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 10[ENC] received fragment #1 of 2, waiting for complete IKE message
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 10[MGR] checkin IKE_SA (unnamed)[2]
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 10[MGR] checkin of IKE_SA successful
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[MGR] checkout IKEv2 SA by message with SPIs d026565155dc83e0_i 76c33ab5aa293765_r
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[MGR] IKE_SA (unnamed)[2] successfully checked out
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[NET] received packet: from fd00:4444:5555:6666::2[4500] to fd00:1111:2222:3333::2[4500] (772 bytes)
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[ENC] parsed IKE_AUTH request 1 [ EF(2/2) ]
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[ENC] received fragment #2 of 2, reassembled fragmented IKE message (1920 bytes)
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[ENC] parsed IKE_AUTH request 1 [ IDi CERT N(INIT_CONTACT) CERTREQ IDr AUTH SA TSi TSr N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_4_ADDR) N(ADD_6_ADDR) N(ADD_6_ADDR) N(ADD_6_ADDR) N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] received cert request for "C=CZ, ST=Czech republic, L=FrydekMistek, O=OU, OU=OU, CN=My CA, E=sasinka.martin@gmail.com"
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] received end entity cert "C=CZ, ST=Czech republic, L=FrydekMistek, O=OU, OU=OU, CN=computer2, E=sasinka.martin@gmail.com"
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[CFG] looking for peer configs matching fd00:1111:2222:3333::2[computer1]...fd00:4444:5555:6666::2[C=CZ, ST=Czech republic, L=FrydekMistek, O=OU, OU=OU, CN=computer2, E=sasinka.martin@gmail.com]
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[CFG] no matching peer config found
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] peer supports MOBIKE
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] got additional MOBIKE peer address: 192.168.88.246
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] got additional MOBIKE peer address: 192.168.1.48
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] got additional MOBIKE peer address: fd00:1111:2222:3333:70cf:7fe3:26c5:7345
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] got additional MOBIKE peer address: fd00:9999:8888:7777:9d4:e1dd:7a3d:502a
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[IKE] got additional MOBIKE peer address: fd00:4444:5555:6666:7379:3fd6:6178:f67d
Jul 17 15:20:12 martin-Legion-5-15IAH7H charon: 11[ENC] generating IKE_AUTH response 1 [ N(AUTH_FAILED) ]
So the problem is no matching peer config found
computer1 ipsec.conf
conn hosttohost
left=fd00:1111:2222:3333::2
leftcert=server-cert.pem
leftsubnet=fd00:1111:2222:3333::/64
leftid=@computer1
right=fd00:4444:5555:6666::2
rightsubnet=fd00:4444:5555:6666::/64
rightid=@computer2
keyexchange=ikev2
ike=aes256-sha256-modp3072
esp=aes256gcm16-sha384-modp3072
authby=rsasig
type=tunnel
auto=add
computer2 ipsec.conf
conn hosttohost
left=fd00:4444:5555:6666::2
leftcert=client-cert.pem
leftsubnet=fd00:4444:5555:6666::/64
leftid=@computer2
right=fd00:1111:2222:3333::2
rightid=@computer1
keyexchange=ikev2
ike=aes256-sha256-modp3072
esp=aes256gcm16-sha384-modp3072
authby=rsasig
type=tunnel
auto=add
Any ideas please?