Hello Tony,
as to 1: that particular solar panel model is modelled as a current source, so it cannot connect directly with an inductor. If this limiation is problematic, you can use the simscape solar cell instead, which will not have this issue: https://www.mathworks.com/help/physmod/sps/ref/solarcell.html. You will need to rebuild your models in simscape instead of specialized power systems.
2: please see this page: https://www.mathworks.com/solutions/power-electronics-control/mppt-algorithm.html
and then follow the link to this page for downloads of the actual algorithm: https://www.mathworks.com/campaigns/offers/mppt-algorithm-models.confirmation.html?elqsid=1599061450230&potential_use=Commercial&elqCampaignId=10588
Regards,
Joel