Your post-purchase fact-checking is 100% correct, so I'm not sure what else you might expect to happen with your unsupported Lt version of AutoCAD
https://www.autodesk.com/buying/flex/flex-rate-sheet#:~:text=%2499/day-,AutoCAD,%2421/day,-CFD%20Ult... Full AutoCAD it is for sure.
For AutoCADLT, looks like the cheapest you can do is a monthly subscription (and your tokens purchase are lost unless you can find a use for them elsewhere)
https://www.autodesk.com/products/autocad-lt/overview?mktvar002=5656794|SEM|10638331915|111881473184|aud-1404902088615:kwd-298445757101&utm_source=GGL&utm_medium=SEM&utm_campaign=GGL_DEC_AutoCAD-LT_AMER_US_eComm_SEM_BR_RMKT_EX_0000_5656794_&utm_id=5656794&utm_term=aud-1404902088615:kwd-298445757101&mkwid=sYa0KLyjF|pcrid|632328348912|pkw|autocad%20lt%20subscription%20price|pmt|e|pdv|c|slid||pgrid|111881473184|ptaid|aud-1404902088615:kwd-298445757101|pid|&utm_medium=cpc&utm_source=google&utm_campaign=GGL_DEC_AutoCAD-LT_AMER_US_eComm_SEM_BR_New_EX_ADSK_3360535_&utm_term=autocad%20lt%20subscription%20price&utm_content=sYa0KLyjF|pcrid|632328348912|pkw|autocad%20lt%20subscription%20price|pmt|e|pdv|c|slid||pgrid|111881473184|ptaid|aud-1404902088615:kwd-298445757101|&gclid=CjwKCAjwitShBhA6EiwAq3RqA6RK4DpfAGJ16xuh3A_3tk2EJGiBOodmwh1a-AYvnXkEdM0lYwdhuxoC52oQAvD_BwE&ef_id=YkTamQAEy9AA1QA-:20230411121342:s&term=1-YEAR&tab=subscription&plc=ACDLT
HTH