One can buy "all-in-one" index-of-index funds that have all US equities, all EU, etc. In Canada (which sub-thread stated with), see VEQT or XEQT (100% equities), VGRO/XGRO (80/20), VBAL/XBAL (60/40), VCNS/XCNS (40/60).

You can probably find an 'asset allocation' fund in most countries; e.g., in the US:

* https://investor.vanguard.com/investment-products/mutual-fun...

There are also (more dynamic) 'target date' funds, where the bond allocation increases over time.