Koinly is primarily designed for crypto tax tracking and reporting. As such, it doesn't currently support traditional financial instruments:
Koinly does not support stocks
Koinly does not support ETFs
There are multiple exchanges where you can trade both crypto and traditional stocks (eToro, Kraken, to name a few) but if you add an exchange to Koinly where you traded both crypto and stocks, only crypto transactions will be imported.
xStocks
Tokenized stocks (usually called xStocks) are treated like standard digital assets (crypto) and, as such, tokenized stocks are supported by Koinly. Your trades with xStocks will be imported normally and capital gains will be calculated like for any other crypto asset.
How to report stocks?
If you traded both stocks and crypto, you can:
Use Koinly to import your crypto activity
Generate reports to see your total crypto capital gains (and crypto income)
Most exchanges will send you a summary of your stock trading activity with capital gains and dividends calculated
Use both Koinly reports (for crypto) and the documents from the exchanges (for stocks and ETFs) when filing your taxes