https://www.transparenciafiscal.gob.sv/ptf/es/PTF2-Datos_Abiertos.html
Going briefly over the portal, I’ve only managed to come-up with some accounting information with references to bitcoin. Namely, the database entry labelled "Ejecución del gasto por clasificación presupuestaria" (data as of September 2021 so far) allows us to download a pdf with data related to open budgets. The pdf includes 4 entries related to Bitcoin:
1412 Financiamiento al Fideicomiso para Operativizar la Circulación de Moneda Digital Bitcoin 2021 (october)-> 50 M $ (programmed, 25$ commited)
1416 Bono Bitcoin 2021 (September) -> 0 $
1416 Bono Bitcoin 2021 (October) -> 30 M $ (programmed)
The former 2 aggregate to the 150M $ Trust fund we know about. The latter 30M $ suggest a budget to pay out bitcoin redemptions, which I thought was all budgeted under the 150 M $ allocated to the Trust.
I haven't seen anything else much, but some quarterly reports are not due until end of year, and I’m not really well acquainted with their information. Perhaps someone more local (if there’s anyone around here from there) can find other sources within the portal that may be of interest to track and pinpoint these purchases.