Falling Aussy Dollar, page-5

if only if life was so simple as you make it. first Lynas's product is probably priced in multiple currencies. The largest is probably either USD it is still a standard. or MYR since most of the expense is in Malaysia.
The biggest Asset Lynas hold is AUD 680M in Cash So go to page 50 then jump to note C1 on page 77 and read through Note C6 on page 84. and figure where assets and accounting is done then compare with how the AUD USD and MYR have change and you will have a good idea what may happen without speculations.
Next according to page 59 of the AR the second largest single asset is the lamp. The AUD MYR has been rising this will reduce assets. Hitting bottom line profits in H1.

Welcome to the fun of international investing. If you are not an AU citizen then add in the change in exchange rate to your own currency

From AR here is there cash exposure by country. MYR will hurt if they did not change it. Formatting is a little messed up info is on AR page 84.

As at 30 June 2021
Net exposure of US$ financial assets US$ 188,280 18,828 – (18,828) –
Net exposure of A$ financial assets A$ 1,674 167 – (167) –
Net asset exposure – MYR currency MYR 494,723 – (14,407) – 17,608
Net asset exposure – US$ currency US$ (1,971) – 262 – (262)