PHP built in web server on network

Question

sudo ufw status       
Status: active

To                         Action      From
--                         ------      ----
8080                       ALLOW       Anywhere                  
8080 (v6)                  ALLOW       Anywhere (v6)             

8080                       ALLOW OUT   Anywhere                  
8080 (v6)                  ALLOW OUT   Anywhere (v6)

To serve, I do php -S 0.0.0.0:8080, on the machine I can access it through 0.0.0.0:8080, 192.168.0.150:8080 or 127.0.0.1:8080, but on my phone or another computer in the network, 192.168.0.150:8080 does not work.

Is the firewall ok? Is there any way to find out if I have another firewall?
Also, in my router, but this should not matter I think, since it's still inside the network

sudo iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain DOCKER (0 references)
target     prot opt source               destination         

Chain DOCKER-ISOLATION-STAGE-1 (0 references)
target     prot opt source               destination         

Chain DOCKER-ISOLATION-STAGE-2 (0 references)
target     prot opt source               destination         

Chain DOCKER-USER (0 references)
target     prot opt source               destination         

Chain ufw-after-forward (0 references)
target     prot opt source               destination         

Chain ufw-after-input (0 references)
target     prot opt source               destination         

Chain ufw-after-logging-forward (0 references)
target     prot opt source               destination         

Chain ufw-after-logging-input (0 references)
target     prot opt source               destination         

Chain ufw-after-logging-output (0 references)
target     prot opt source               destination         

Chain ufw-after-output (0 references)
target     prot opt source               destination         

Chain ufw-before-forward (0 references)
target     prot opt source               destination         

Chain ufw-before-input (0 references)
target     prot opt source               destination         

Chain ufw-before-logging-forward (0 references)
target     prot opt source               destination         

Chain ufw-before-logging-input (0 references)
target     prot opt source               destination         

Chain ufw-before-logging-output (0 references)
target     prot opt source               destination         

Chain ufw-before-output (0 references)
target     prot opt source               destination         

Chain ufw-reject-forward (0 references)
target     prot opt source               destination         

Chain ufw-reject-input (0 references)
target     prot opt source               destination         

Chain ufw-reject-output (0 references)
target     prot opt source               destination         

Chain ufw-track-forward (0 references)
target     prot opt source               destination         

Chain ufw-track-input (0 references)
target     prot opt source               destination         

Chain ufw-track-output (0 references)
target     prot opt source               destination