Many thanks to Christophe V., Lubomir O. and Charles L. for useful answers !

I summarize:

in Madhukar M. Patkar, History of Sanskrit Lexicography, New Delhi: Munshiram Manoharlal, there is no paragraph devoted to Raghunātha Cakravartin's Trikāṇḍacintāmaṇi, but it is listed in the index p. 173 with ref. to Rajendralal Mitra's Notices of Sanskrit Manuscripts vol. 5, 1879 (attached).
The 1886 ed. appears to be available in Vienna: https://permalink.obvsg.at/AC0894304. Amara-Sinha. With the annotation of Raghu Natha Chakrabartty. Ed. by Chandra Mohun Tarkaratna, Calcutta : Soor, 1886. I have still found no digital version of it.
Another publication that seems to contain Raghunātha's commentary is this one https://babel.hathitrust.org/cgi/pt?id=uc1.c082538153— in Bengali script.
Ramavatar Sarma's edition of the Kalpadrukośa mentions an edition that still eludes me entirely (https://jainqq.org/pagetext/Kalpadru_Kosh_Vol_01/016138/9):

"Tr. C. Trikaṇḍacintamani (Raghunatha Cakravartin's Commentary on Amara), Ed. by Candrakanta Tarkalankara, Calcutta, Saka 1823. In the title page, however, it is called Candrika, but see the Colophons."

Does anyone happen to have a pdf of Chandra Mohun Tarkaratna's (1886) and/or Candrakanta Tarkalankara's (Śaka 1823 = CE 1901) edition, or know where to find them online?

Best wishes,

Arlo