It should be detectable, but the Ĝ Infrared Search[1] didn't find any in the WISE[2] data. Jason Wright talked about this and related topics in a SETI institute

It should be detectable, but the Ĝ Infrared Search[1] didn't find any in the WISE[2] data. Jason Wright talked about this and related topics in a SETI institute video[3]. [1] https://arxiv.org/abs/1408.1134 https://arxiv.org/abs/1408.1134 [2] https://en.wikipedia.org/wiki/Wide-field_Infrared_Survey_Explorer https://en.wikipedia.org/wiki/Wide-field_Infrared_Survey_Exp... [3] https://www.youtube.com/watch?v=XEDR-G2EDRM https://www.youtube.com/watch?v=XEDR-G2EDRM