結局wslの再起動で解決したが、以下その経過ログ

作業ログ

service自体は上手く立っているようだ

$ service apache2 status
 * apache2 is running
$ curl -I localhost
curl: (7) Couldn't connect to server
$ curl -I 0.0.0.0
curl: (7) Couldn't connect to server

service apache2 stopやstartで再起動などを繰り返してみた、error_logには起動の旨書かれている

$ tail -f /var/log/apache2/error.log
[Mon Aug 29 09:36:31.687131 2022] [mpm_prefork:notice] [pid 300] AH00163: Apache/2.4.52 (Ubuntu) configured -- resuming normal operations
[Mon Aug 29 09:36:31.687177 2022] [core:notice] [pid 300] AH00094: Command line: '/usr/sbin/apache2'
[Mon Aug 29 09:36:52.204486 2022] [mpm_prefork:notice] [pid 300] AH00169: caught SIGTERM, shutting down
[Mon Aug 29 09:37:08.792250 2022] [mpm_prefork:notice] [pid 377] AH00163: Apache/2.4.52 (Ubuntu) configured -- resuming normal operations
[Mon Aug 29 09:37:08.792293 2022] [core:notice] [pid 377] AH00094: Command line: '/usr/sbin/apache2'

lsofでhttp(:80)ポート確認、問題なく確保できている

$ sudo lsof -i:80
COMMAND PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
apache2 377     root    3u  IPv6  17054      0t0  TCP *:http (LISTEN)
apache2 380 www-data    3u  IPv6  17054      0t0  TCP *:http (LISTEN)
apache2 381 www-data    3u  IPv6  17054      0t0  TCP *:http (LISTEN)
apache2 382 www-data    3u  IPv6  17054      0t0  TCP *:http (LISTEN)
apache2 383 www-data    3u  IPv6  17054      0t0  TCP *:http (LISTEN)
apache2 384 www-data    3u  IPv6  17054      0t0  TCP *:http (LISTEN)

ネットワークを見てみる、wslはifconfigではなくipで見る　見たところinet設定が無い

$ ip address show
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 72:e4:06:4e:49:0e brd ff:ff:ff:ff:ff:ff
3: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 4a:5d:49:a6:df:ab brd ff:ff:ff:ff:ff:ff
4: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000
    link/sit 0.0.0.0 brd 0.0.0.0
5: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:15:5d:10:0f:49 brd ff:ff:ff:ff:ff:ff

wsl再起動する、Win側のコマンドプロンプトで以下実行

C:\> wsl --shutdown

起動はubuntuターミナルを起動すればOK、ネットワークを見るとちゃんとloopbackのinetが復活している

$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 0e:c6:f7:f3:01:85 brd ff:ff:ff:ff:ff:ff
3: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d2:da:3f:4b:54:fb brd ff:ff:ff:ff:ff:ff
4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:15:5d:10:06:fb brd ff:ff:ff:ff:ff:ff
    inet 172.28.230.27/20 brd 172.28.239.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::215:5dff:fe10:6fb/64 scope link
       valid_lft forever preferred_lft forever
5: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000
    link/sit 0.0.0.0 brd 0.0.0.0

service apache2を再起動してcurlできるようになった

$ sudo service apache2 start
 * Starting Apache httpd web server apache2
$ curl http://localhost
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
...