I am working on a commentary on the Psalms. I have decided to compile some helpful links that I discovered during my research. It includes a mix of exegetical and sermonic links. Here is what I have for Psalm 99 (in no particular order). Feel free to mention any that you find helpful in the comments section.
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps099.pdf
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_099.pdf
Psalm 99 devotional: https://www.generations.org/devotionals/112
Steven Cole sermon: https://bible.org/seriespage/psalm-99-holy-he
Scott Hoezee commentary: https://cepreaching.org/commentary/2022-02-21/psalm-99-4