Hello, @tokiedian-steelpanthers,
Your default Noto Mono font does not reproduce the glyphs of the Unicode IPA Extensions block characters, below :
http://www.unicode.org/charts/PDF/U0250.pdf
Here are, below, a table with a summary of some monospaced fonts, which represent all IPA extensions characters, properly
For the record, you may, also, refer to :
The two MS Mincho and MS Gothic fonts, which can handle the Japanese Hiragana and Katakata characters
The proportional fonts Lucida Sans Unicode and Microsoft Sans Serif, which both support the IPA Extensions characters, too
•----------------------•-----------•--------•---------•-------•-------------------------------------------------------------------------------------------------------•
| Font Name | Version | Glyphs | Digit 0 | Serif | Download link |
•----------------------•-----------•--------•---------•-------•-------------------------------------------------------------------------------------------------------•
| Code New Roman | 2.10 | 2,740 | Slashed | | http://www.fontspace.com/download/21129/7aaebf327a7240b98dabadef5d1bc786/typostyle_code-new-roman.zip |
| Consola Mono | 2.001 | 1,465 | Slashed | | https://fontlibrary.org/assets/downloads/consolamono/61cc2afcc4eca96efe7c6ebf178d39df/consolamono.zip |
| Cousine | 1.20 | 2,385 | Dotted | | https://www.fontsquirrel.com/fonts/download/cousine |
| DET Terminal Modern | 1.0 | 2,218 | | | https://dl.dafont.com/dl/?f=dec_terminal_modern |
| DejaVu Sans Mono | 2.37 | 3,377 | Dotted | | http://sourceforge.net/projects/dejavu/files/dejavu/2.37/dejavu-fonts-ttf-2.37.zip |
| Espresso Mono | 2.17 | 2,870 | Slashed | | https://github.com/jmazzi/dotfiles/tree/master/.fonts |
| FreeMono | 0412 2268 | 4,177 | | Yes | http://ftp.gnu.org/gnu/freefont/freefont-ttf-20120503.zip |
| Iosevka | 2.0.0 | 3,712 | Slashed | | https://github.com/be5invis/Iosevka/releases |
| Iosevka Slab | 2.0.0 | 3,712 | Slashed | Yes | https://github.com/be5invis/Iosevka/releases |
| Meslo LG M | 1.210 | 2,708 | Slashed | | https://github.com/andreberg/Meslo-Font/archive/master.zip |
| Meslo LG S | 1.210 | 2,708 | Slashed | | https://github.com/andreberg/Meslo-Font/archive/master.zip |
| Meslo LG M DZ | 1.210 | 2,708 | Dotted | | https://github.com/andreberg/Meslo-Font/archive/master.zip |
| Meslo LG S DZ | 1.210 | 2,708 | Dotted | | https://github.com/andreberg/Meslo-Font/archive/master.zip |
•----------------------•-----------•--------•---------•-------•-------------------------------------------------------------------------------------------------------•
| MS Gothic | 5.10 | 22,290 | | | |
| MS Mincho | 5.10 | 19,398 | | Yes | |
•----------------------•-----------•--------•---------•-------•-------------------------------------------------------------------------------------------------------•
| Lucida Sans Unicode | 5.00 | 1,779 | | | |
| Microsoft Sans Serif | 5.11 | 3,205 | | | |
•----------------------•-----------•--------•---------•-------•-------------------------------------------------------------------------------------------------------•
Cheers,
guy038