"The Types Riot was the..." -> "The Types Riot refers to the..."
Done
I think the Family Compact are important enough to be mentioned in the opening sentence, probably as "... printing press and movable type by members of the Family Compact on June 8, 1826..."
"... assumed the event was sanctioned by the Upper Canadian government" can be made active as "assumed the Upper Canadian government sanctioned the event."
This section is too short to justify its own heading (MOS:OVERSECTION: "Very short sections and subsections clutter an article with headings and inhibit the flow of the prose. Short paragraphs and single sentences generally do not warrant their own subheading.") Consider joining it in the next section.
Buidhe commented on this below that it should stay lowercase, so I won't change it right now (although I would support changing MOS for capitalisation)
"spectators were gathered" -> "spectators gathered"
Done
"the passion of the rioters was displayed without restraint" -> "the rioters displayed their passion without restraint"
Done
Immediate aftermath
"thrown Mackenzie into the bay": you refer to it as Toronto Harbour earlier, so your readers won't know that it is also called Toronto Bay
I know that the bay is called "Toronto Bay" today, but I cannot verify what the name of the bay was at that time, nor what William Jarvis called it. Sources keep referring to it as "the bay".
"Only eleven of the summoned men came to serve on the jury." This sentence confused me. Does it mean that sixteen men were summoned and only eleven showed up, or does it mean that of the sixteen summoned five were later eliminated, leaving eleven.
"Hagerman's address to the jury was printed in the Upper Canada Herald and totalled 4400 words" -> "The Upper Canada Heraldprinted Hagerman's address to the jury, totalling 4400 words
"Jarvis's wife Mary was surprised with the low amount that was awarded to Mackenzie." -> "The low amount awarded to Mackenzie surprised Jarvis's wife, Mary."
Done
"lieutenant governor" -> however you want to standardize it
Checking print sources available on Google Books as well as JSTOR journal articles indicates the info is properly sourced.
Images
The Mackenzie portrait needs a US PD tag. If it was published the PD-old-auto 1996 tag will probably work. If it was never published, then PD-US-unpublished
B/c the Samuel Jarvis image is an anonymous photograph we can use the PD-Canada-anon tag instead. It also needs a US tag; the Template:PD-old-assumed one should work.
This GA review looks very thorough to me. The only issue I see is that you are asking for the article to follow the Canadian government style instead of MOS. Unless the Canadian government style guide is adopted by consensus, then MOS:CAPS would apply. Judging from NGRAMS there is co consistent capitalization of the word "indigenous", so it should stay in lowercase. (t · c) buidhe13:13, 13 May 2021 (UTC)[reply]
Also, PD-old-assumed is NOT a US PD tag and states explicitly, "You must also include a United States public domain tag to indicate why this work is in the public domain in the United States." So this image will need a different US PD tag; PD-1996 should work. (t · c) buidhe14:52, 13 May 2021 (UTC)[reply]
@Tkbrett:@Buidhe: I commented on the points above. Most were fixed, but some might require a double-check (like the images). Thanks for your comments and review. Z1720 (talk) 16:24, 13 May 2021 (UTC)[reply]
@Buidhe:: The article does use the Use Canadian English template, but I take your point that it's not part of the MOS. A GA review is hardly the place to debate this, so I've gone ahead and struck that point. Thanks re:PD tags. Thanks so much for your help, I really appreciate it! Big fan of your work. Tkbrett (✉)18:36, 13 May 2021 (UTC)[reply]
@Z1720:: pass: everything looks good so I've changed the status to pass. Very nice work! Happy to see these important Canadian history pages are being fleshed out. Tkbrett (✉)18:36, 13 May 2021 (UTC)[reply]