  We present a further observational analysis of the $\Lambda_{\rm s}$CDM model
proposed in Akarsu et al. [Phys. Rev. D 104, 123512 (2021)]. This model is
based on the recent conjecture suggesting the Universe has transitioned from
anti-de Sitter vacua to de Sitter vacua (viz., the cosmological constant
switches sign from negative to positive), at redshift ${z_\dagger\sim2}$,
inspired by the graduated dark energy model proposed in Akarsu et al. [Phys.
Rev. D 101, 063528 (2020)]. $\Lambda_{\rm s}$CDM was previously claimed to
simultaneously relax five cosmological discrepancies, namely, the $H_0$, $S_8$,
and $M_B$ tensions along with the Ly-$\alpha$ and $\omega_{\rm b}$ anomalies,
which prevail within the standard $\Lambda$CDM model as well as its
canonical/simple extensions. In the present work, we extend the previous
analysis by constraining the model using the Pantheon data (with and without
the SH0ES $M_B$ prior) and/or the completed BAO data along with the full Planck
CMB data. We find that $\Lambda_{\rm s}$CDM exhibits a better fit to the data
compared to $\Lambda$CDM, and simultaneously relaxes the six discrepancies of
$\Lambda$CDM, viz., the $H_0$, $M_B$, $S_8$, Ly-$\alpha$, $t_0$, and
$\omega_{\rm b}$ discrepancies, all of which are discussed in detail. When the
$M_B$ prior is included in the analyses, $\Lambda_{\rm s}$CDM performs
significantly better in relaxing the $H_0$, $M_B$, and $S_8$ tensions with the
constraint ${z_\dagger\sim1.8}$ even when the Ly-$\alpha$ data (which imposed
the $z_\dagger\sim2$ constraint in the previous studies) are excluded. In
contrast, the presence of the $M_B$ prior causes only negligible improvements
for $\Lambda$CDM. Thus, the $\Lambda_{\rm s}$CDM model provides remedy to
various cosmological tensions simultaneously, only that the galaxy BAO data
hinder its success to some extent.
