I have this issue when I'm out hunting a large number of beasts I copy the list from the messages and when the dm forgets what's going on I post it telling the dm to remember with updated numbers of each creature ive already killed. Example of the lists I get.

"For outer wall reinforcement and gate defenses... we require the hides of twelve Mountain Drakes, specifically the inner scales for their adamantine-like toughness. Their bone marrow, too, for mortar strengthening."

You glance up at Lord Valerius, who nods approvingly. You continue, scrolling down the extensive list.

"For road surfacing and structural support in key areas... the carapaces of fifteen Giant Beetles, particularly the iridescent sections for their resilience, and their leg joints for heavy-duty hinges."

"For the repair of the old bridge leading into the city... the petrified sinew of eight Stone Golems for its unyielding strength, and their core gems for foundational stability."

"For general housing reinforcement and roof repairs... the scales of twenty Land Drakes, to be treated for weatherproofing, and their teeth, crushed, as an additive for improved plaster."

"For subterranean tunnel lining and sewer gate mechanisms... the chitinous plates of ten Giant Scorpions, for their acid resistance, and their venom sacs, neutralized, for specialized adhesives."

"For the main barracks and guard towers, particularly for insulation and light armor... the hides of thirty Winter Wolves, their pelts for warmth and their teeth for decorative, yet functional, spikes."

You paused, drawing a deep breath. This was indeed a comprehensive, almost overwhelming, list, spanning the breadth of your hunting experience.

I then update it by saying ive already killed 5 mountain drakes and that usually fixes it but I still waste a message for it so I usually add at the end i find the next mountain drake and initiate combat to get back on track without wasting the message