I have Xduoo Link:What is the model of you Xduoo DAC? Please note I haven't received my L3s yet from Linsoul so I can't test their sensitivity for you right now.
I assume by compatible you mean it will pair/match well with the L3s? Any Xduoo dac/amp model with a headphone jack will be able to play the L3s. If you have one of xDuoo's models like the XD-05 or XD10 (says suitable for 8 - 300 ohm impedance in manual) then you will probably be okay with not being able to detect hiss on the lowest gain setting.
If you have one of their tube amp models like the TA-05 then you are going to hear background hiss. Tube amps have a high OTL output impedance and are best for driving higher impedance full size headphones like Sennheiser HD650s (300 Ohms). A lot of the new DAPs like Fiio M11, Hiby R5, iBasso DX160 should all have no issues with the background hiss when set to low gain.
I personally don't own any Xduoo dac/amps so I cannot test this for you. But maybe someone on this thread has an Xduoo amp they can test for you once they get their pair.
https://www.xduoo.net/product/xduoo-link/
Do you think its compatibile with the L3 without hissing ? Here is the specs:
https://www.xduoo.net/wp-content/uploads/2019/11/xduoo-link-dac-11.jpg