  A supernova remnant (SNR) candidate SRGe~J0023+3625 = G116.6-26.1 was
recently discovered in the \textit{SRG}/eROSITA all-sky X-ray survey. This
large ($\sim 4$ deg in diameter) SNR candidate lacks prominent counterparts in
other bands. Here we report detection of radio emission from G116.6-26.1 in the
LOFAR Two-metre Sky Survey (LoTTS-DR2). Radio images show a shell-like
structure coincident with the X-ray boundary of the SNR. The measured surface
brightness of radio emission from this SNR is very low. Extrapolation of the
observed surface brightness to 1~GHz places G116.6-26.1 well below other
objects in the $\Sigma-D$ diagram. We argue that the detected radio flux might
be consistent with the minimal level expected in the van der Laan adiabatic
compression model, provided that the volume emissivity of the halo gas in the
LOFAR band is $\sim 10^{-42}\,{\rm Wm^{-3}Hz^{-1} sr^{-1}}$. If true, this SNR
can be considered as a prototypical example of an evolved SNR in the Milky Way
halo. In the X-ray and radio bands, such SNRs can be used as probes of thermal
and non-thermal components constituting the Milky Way halo.
