Welcome BentleyB. That's a shame that Nabtrade does not have...

Welcome BentleyB. That's a shame that Nabtrade does not have that, so its time you find another stock trading platform that allows you to.

Now I won't recommend or advise you anything as you have to DYOR, but I tell you what I use.

You can trade using STAKE for ASX and US stocks, very low fees and can buy in small quantities too, any amount for that matter. You can buy a fraction of a share for US$3 per trade fee.
Stake | Online Investing Platform in Australia for ASX & Wall St (***.com)

OR

You can buy Gold & Silver via an app RUSH , the purchase will be stored as physical gold/silver in their vault. There is a 1% fee on Gold and higher for Silver.
I use this to buy portion for the long term (not to trade)
Buy gold and silver, sell, exchange and offer all with the Rush App

If you are on STAKE, you can have access to international precious metals ETF

Among those I use:

AGQ (Proshares Ultra Silver) - gives 2x Silver performance (cut both ways, up and down)

GLD (SPDR Gold)