Yes, in two ways. Capital gains run through the Spanish savings-income brackets, from 19% to 30%, with every foreign trade converted at the official rate of its own trade date, and losses carried forward against later gains.
The Modelo 720 report is separate and built for it: your foreign holdings are grouped into the categories the declaration uses, valued at the year end, and written out as a file in the official format ready to upload.
A repurchase inside sixty days of a loss is flagged, so the two-month rule does not catch you by surprise.
On a paid plan there is also a Modelo 100 filing pack: every disposal of the year in euros, the repurchase losses still suspended, earlier years of losses applied, and an estimated savings base and tax, out as PDF, Excel or CSV.
What you get is the figures and the files. The return is still filed by you or your asesor.
Related: Interactive Brokers and Spanish tax The Modelo 720 report
See the Spanish tax report