Noto Sans Mono Bold not available from /etc/fonts/local.conf

[Jeff Zignego]

I tried to change my monospace font to "Noto Sans Mono Bold" in /etc/fonts/local.conf but that didn't have an effect so I did a little digging. First I ran
$ sudo fc-cache -f -v && sudo dpkg-reconfigure fontconfig fontconfig-config

Which succeeded, then:
$ fc-list :style=bold | grep -i notosansmono
>/usr/share/fonts/truetype/noto/NotoSansMono-Bold.ttf: Noto Sans Mono:style=Bold

So then:
$fc-query /usr/share/fonts/truetype/noto/NotoSansMono-Bold.ttf | less
which seemed to return a normal looking result similar to:
$fc-query /usr/share/fonts/truetype/noto/NotoSansMono-Regular.ttf | less

Then I ran:
$ fc-match -s "monospace" | grep -i bold
>DejaVuSansMono-Bold.ttf: "DejaVu Sans Mono" "Bold"
>MathJax_Fraktur-Bold.otf: "MathJax_Fraktur" "Bold"
>padmaa-Bold.1.1.ttf: "padmaa-Bold.1.1" "Bold.1.1"
>DejaVuSans-BoldOblique.ttf: "DejaVu Sans" "Bold Oblique"

Which obviously isn't right since it isn't in that list. Also:
$fc-match -s "NotoSansMono" | grep -i notosansmono
>NotoSansMono-Regular.ttf: "Noto Sans Mono" "Regular"

My system is up to date and here is my version:
$lsb_release -a
lsb_release:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic

$uname -a
>Linux 9343 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux