My take on the Dwarves (so, nothing especially canon...)
On Jaiman, the founding dwarven kingdom was the one of the Brass Stair in Wuliris, which had satellite colonies further north. When the kingdom fell, the dwarves scattered in several directions. Some settled among men in Wuliris, others went south under the mountain, and yet others went west.
Those who went into Wuliris were never numerous and, while trading intensively with men, mostly kept to themselves and tried to establish communities in the western foothills (where they could find mines). A number of families stayed in the mannish towns, maintaining contact with their clanfolk in the hills. Their fare waxed and waned with that of the mannish kingdoms.
Those who went south underwent much tribulations. Some stopped during the long and dangerous journey and settled in the mountain valleys of southern Zor, but they never prospered and returned to more tribal customs. Others continued south and split yet again, with some stopping to establish a new underground settlement in the Grey Mountains facing southwestern Tanara. The remaining dwarves continued underground to escape once and for all, and emerged near the straits between Tanara and Urulan. They crossed the straits and went back north, digging into the mountains of centrail Urulan and establishing a distinct culture.
One side consequence of that is that there are "deep roads" through most of the Grey Mountain range in Jaiman. They are partially destroyed by disasters and lack of maintenance, and are not necessarily safer than travelling above ground.
Those who went west crossed the perilous zone between the Zor wastes and the great forest of Lu'Nak, and reached the Dragonsfang mountains where they settled. They befriended the local gnolls whenever they met the smaller folk, but beyond that, mostly kept to themselves. Somewhere during the Third Era, their underground holds were sundered and the survivors scattered south in Saralis, creating a diaspora in several saralian towns.
In Emer, the main kingdom currently is Ton-Bor, but there is a dwarven presence in Bentara and Izar. The dwarves of Ton-Gor have not migrated far. There might have been small holds in the northern Scorpion Ridge (crossing the straits of Izar and going to the mountains in search of ores) but the Scorpion Ridge is home to a number of threats and it is doubtful that any hold has survived to this day. A few dwarves have migrated east towards the Spine of Emer during the early days of the Empire, but once again, it is likely that no hold has survived there, probably because of stiff competition from the Murlogi and lack of support from the surrounding mannish kingdoms (notably Stroane and the Lankan Empire). A few scattered dwarven families still live in the large cities of Miir, notably Relian.
Of course, it is entirely possible to meet a dwarf or two in such trade centers as Sel-Kai and Kaitaine, but their tendency to settle close to a mountain range and to avoid sea travels make them unlikely residents of those two coastal cities.
[No Nomari settlement in Kelestia in my headcanon. Others are as per MA 4 whenever appropriate : Baku-jagum in Govon, probably remnants of the city overrun by goblins in Mythenis, Burdok-Rhu in Falias. MA4 mentions that "there are at least four distinct tribes of dwarves", and if you consider that each continental settlement is a separate tribe, we end up with five if you consider the Jaiman dwarves as canon. I personally think that there are more, but being underground folk, they tend to go unnoticed for long periods of time and to avoid getting involved in the affairs (and wars) of men and elves.]
