Here's a collection of images taken with the Sony RX100 VII at high ISOs to give a sense of how it performs in low-light conditions.
Sony RX100 VII review - Amateur Photographer
Lens Rentals
Sony RX100 VII ISO Range
Sony RX100 VII « NEW CAMERA
Sony RX100 VII Review
Sony Cyber-shot RX100 VII Review
RX100 in low light - Korean High ISO samples: Sony Cyber-shot Talk Forum: Digital Photography Review
Sony RX100 VII Review - The Ultimate Run And Gun Camera –
Sony Cyber-shot DSC-RX100 VII Review: Digital Photography Review
Sony Cyber-shot RX100 VII (RX100M7) Full HD Samples, ISO and lens review