This question is very broad and the answer depends on what you consider as technical repairs or optimization. If you only ask us for a faster operation of your website, we will not be able to help you without a thorough analysis and a long-term problem detection.
What can you do in such a case?
We advise you to review the weight of the images on the page. If the banner images are heavier than 500KB and if the product images are heavier than 100KB, then we advise you to reduce the weight of these to begin with.
If the page is still slow, check which plugins are being used effectively. Delete all redundant plugins.
If the page is still slow, contact the company, where you have the server and ask them what could be done to improve the server speed. Do not opt for the Reseller hosting. You should only opt for such hosting if you have several websites and each of them is based on a different CMS (Sol-CMS, Word Press, Joomla …).
In recent years, definitions of when a site is fast or slow have been a matter of some controversy. The programs that rate websites often have servers overseas and cannot show a real picture for a Slovenian website, hosted on a Slovenian or European server.
The general LightHouse programme, which “fairly” realistically assesses the quality of a website, has its shortcomings, too. The speed of the website on mobile devices is still estimated based on a slow 3G internet connection. Such a connection can, globally speaking, only be found in less developed areas. Most of the users in Slovenia are using a 5G or at least a 4G network.