There has been a lot of misinformation on the topic, so it does not surprise me you had been misinformed or mislead. While the companies involved do work hard at reclamation many of the environmental impacts are shared between lithium and oil mining pollution and contamination are left behind. While the landscape is not brought back to it's prior state it does look natural.
Many lithium mine reclamation plans, such as the Thacker Pass Lithium Mine Project share reclamation design strategies and goals as mines in the Alberta oilsands, and are occasionally created and managed by the same firms. There are mines that have been remediated to the same level as past oil sands sites available for you to find, however like the oil sands results have been presented as both success and failure by people for and against future projects.
I'm not aware of any issues with labour in Australia which is currently by far the worlds largest source of lithium, but
just as with oil, steel, and other resources we currently import for auto production or use standards for pollution and worker safety drop drastically in many foreign countries that produce resources for our consumption.
Canada has 2.5% of the worlds lithium reserves. Canadian lithium output has been somewhat sporadic in the past, mainly due to funding and capital issues however several mines are under development. Canada should be producing consistently within the next 2 years, notably from The Snow Lake Mine in Manitoba, which is hoping to set the bar for low in CO2 emissions during operation in part due to the use of hydro electric power.