I have tried looking up the various names that have been suggested here but none of them seem to provide a resistance to resistance translation. Most seem to provide a resistance to Voltage process.
Many years ago I designed an audio mixer with an RCA chip OTA. IIRC, it did not provide a variable resistance at it's output but rather it allowed a control, DC Voltage to control the audio gain of a signal passing through the chip. I don't think that is what you want. But perhaps there were other uses for that chip. Sorry, I do not recall the part number. And I do not think RCA makes them any longer.
Another circuit that I played with was a Voltage controlled pot. It used two CdS cells and an op-amp with totem pole, transistor driver circuit to apply opposite control Voltages/currents to miniature lamps that were directed at the CdS cells. As one Voltage went up the other went down. The same for the lamps. And the same for the resistance of the two CdS cells. I was able to simulate a 50 or 100 KOhm fader pot with proper selection of the values. The op-amp was driven by a pot, but not one of such a low value as you describe as it would have consumed a lot of current for no reason. I believe it was around 10K. The purpose was to allow inexpensive but noise prone pots to control the audio level with that noise being filtered with a capacitor on the center arm of the control pot while the audio went through the CdS cells without any filtering. I just used ordinary, op amps, nothing special as only DC to very low frequency changes went through them. This idea could easily give you a floating, variable resistance with it's value controlled by a Voltage coming from a pot. In today's world I would use LEDs instead of filament lamps.
Back then assemblies with the lamp and CdS cell in one part were available. I doubt that they are still available today, but you could search. The more modern part would probably be an LED and photo-transistor combination which is called an opto-isolator. But that would not be your floating resistor so a different type of circuit would be needed.
https://www.digikey.com/en/products/filter/photo-detectors-cds-cells/540?s=N4IgTCBcDaIA4AsD2AXJACATgUwM4Etc1MQBdAXyA