FC31 : won't activate interfaces - "strictly unmanaged"

[sean darcy <seandarcy2 gmail com>]

Fedora FC31. NetworkManager-1.20.10-1.fc31.x86_64
This a cross post with Fedora user.

On FC31 I can't persistently rename the interfaces, see: 
https://bugzilla.redhat.com/show_bug.cgi?id=1777893

I'll give up and use FC31 interface names : enp1s0 and enp0s20u3.

I've used nmtui to set up the interfaces. But NM won't activate them 
because they are "strictly unmanaged" !!

What does that mean and how do I fix it ?

Is there some other way to persistently activate the interface ?

/etc/network/interfaces does not exist.

sean

 cat /etc/sysconfig/network-scripts/ifcfg-enp*
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
IPADDR=10.10.11.251
PREFIX=24
DNS1=10.10.11.251
DEFROUTE=no
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp0s20u3
UUID=bf8aa45c-31e4-403a-9c14-c1a59bf0f2b2
ONBOOT=yes
DEVICE=enp0s20u3

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp1s0
UUID=a1b089e9-5a13-4df7-8f09-9f54ebc56cea
DEVICE=enp1s0
ONBOOT=yes