SSID is not being hidden, and it's just the RPi3 Model B
ifconfig:
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.185 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::f7:4fe7:4cad:a0 prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:43:66:61 txqueuelen 1000 (Ethernet)
RX packets 34037046 bytes 1964551361 (1.8 GiB)
RX errors 0 dropped 127 overruns 0 frame 0
TX packets 82524281 bytes 121949099448 (113.5 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 7063757 bytes 117464163786 (109.3 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7063757 bytes 117464163786 (109.3 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether b8:27:eb:16:33:34 txqueuelen 1000 (Ethernet)
RX packets 6367 bytes 1440732 (1.3 MiB)
RX errors 0 dropped 11 overruns 0 frame 0
TX packets 1268 bytes 402879 (393.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
iwlist shows all detected wifi networks, including my own:
Cell 10 - Address: 54:B8:0A:35:E5:96
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=62/70 Signal level=-48 dBm
Encryption key:on
ESSID:"My Network"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 50ms ago
IE: Unknown: 000F426F726720436F6C6C656374697665
IE: Unknown: 010882848B962430486C
IE: Unknown: 030106
IE: Unknown: 050400010100
IE: Unknown: 2A0100
IE: Unknown: 32040C121860
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 0B0500001F0000
IE: Unknown: 2D1AAD0117FFFFFF0001000000000000000000000000001804011100
IE: Unknown: 3D1606080000000000000000000000000000000000000000
IE: Unknown: 4A0E14000A002C01C800140005001900
IE: Unknown: 7F080500000000000040
IE: Unknown: DD1E00904C0408BF0CB259820FEAFF0000EAFF0000C0050006000000C3020002
IE: Unknown: DD090010180200001C0000
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101840003A4000027A4000042435E0062322F00