Toolstop - These 1.5 metre guide rails from Dewalt are designed for use with a variety of Dewalt saws (DCS520, DWE520, DCS576, DWE576) and are the best way to guarantee precise, straight,
DeWalt DCS 576 cordless circular saw FlexVolt Brushless 18/54 V 190 mm in T-Stak Box with 1x DCB 546 6 Ah battery : Amazon.nl: DIY & Tools
You can make the reg circ saw into a track saw by switching base plates. This is a standard setup in England I've seen https://www.partshopdirect.co.uk/dewalt-dcs575-dcs576-shoe-base-with-guide-rail-slots-pN472354/ : r/Dewalt