Chemicals, Icon Sugestion: Ethanol | Anno 1800 Wiki [anno1800.fandom.com]
Uses: Replace the current use of fetilizer, becoming the de facto intermediary for many PMs, such as explosives, fertilizer, hardwood, chemical warfare, synthetic paints and silk. Additional uses such as insecticide on plantations and farms, porcelain glazing, and clothing bleaching could be interesting.

Horses, Icon Sugestion: Horse | Anno 1800 Wiki [anno1800.fandom.com]
Uses: Early transportation PMs, like horse carriages for urban centers and horse wagons for roads, farms, and mines. Cavalry militery units consume horses, and meybe add a horse wagon for transportation mobilization option for armys. (Horse PMs also consume Hardwood for the carriage and wagon part?). The mod Basileia Romaion 1736 also uses Horses for its PMs as a reference.

Stone (I could not find a good icon, the best one was from anno 1404, where the quality is not so good. Link: Stone | Anno 1404 Wiki[anno1404.fandom.com], some Ais produced better ones, another options is Bauxite | Anno 1800 Wiki[anno1800.fandom.com])
Represents the many types of stones, such as granite, marble, and limestone. Also I think it can represent other things like sand, clay, quartz, gypsum, and asbestos too.
Uses: Can be used on the early construction PMs, being replaced by cement or concrete later on. For Roads(until asphalt), glass and porcelain PMs.

Cement / Concrete, Icon Sugestion: Cement | Anno 1800 Wiki [anno1800.fandom.com]
Uses: Later Construction PMs.

Canned Food, Icon Sugestion: Canned Food | Anno 1800 Wiki[anno1800.fandom.com]
Uses: Supplies Mobilization option for armys. Need Basic Food.

Some consumer goods Sugetions:

Cosmetics (needs: Luxury Items and Leisure), Icon sugestion:

Icon Option 1: Perfumes | Anno 1800 Wiki [anno1800.fandom.com]
Icon Option 2: Shampoo | Anno 1800 Wiki [anno1800.fandom.com]
Icon Option 3: Lipstick | Anno 1800 Wiki [anno1800.fandom.com]

Cocoa and/or Chocolate (needs: Luxury Food, use chocolate mobilization option )
icons :
Cocoa: Cocoa | Anno 1800 Wiki[anno1800.fandom.com]
Chocolate: Chocolate | Anno 1800 Wiki[anno1800.fandom.com]
(PS: Luxury food already has many options, maybe remove sugar as a luxury food? Also instead of adding cocoa, the plantations should produce chocolate directly, as coffee. I put it in here just as an option)

Juice (needs: Luxury Drinks) made from fruits, icon suggestion: Lemonade | Anno 1800 Wiki[anno1800.fandom.com]

Spices, icon suggestion:
Icon Option 1: Pigments | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 2: Cinnamon | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 3:Spices | Anno 1800 Wiki[anno1800.fandom.com]

Household apliences/Domestic apliances/Apliences (Needs: Household Items and Luxury Items), icon suggestion:
Icon Option 1: Vacuum Cleaners | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 2: Refrigerators | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 3:Fans | Anno 1800 Wiki[anno1800.fandom.com]


Icons redesing suggestions:

Machine Parts, icon suggestions:
Icon Option 1: Nice Scrap | Anno 1800 Wiki | Fandom [anno1800.fandom.com]
Icon Option 2: Special Scrap | Anno 1800 Wiki[anno1800.fandom.com]

Fuel, icon suggestions:
Icon Option 1:Arctic Gas | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 2: Industrial Lubricant | Anno 1800 Wiki [anno1800.fandom.com]
Icon Option 3:Fuel | Anno 2070 Wiki [anno2070.fandom.com]

Plastics, icon suggestions:
Icon Option 1:Celluloid | Anno 1800 Wiki[anno1800.fandom.com]
Icon Option 2:Plastics | Anno 2070 Wiki[anno2070.fandom.com]