The phrase "significantly lagging behind" is correct and usable in written English.
You can use it when you want to describe a situation in which something (or someone) has not kept up with another thing (or person) in terms of progress. For example: "Our competitors' technology is significantly lagging behind ours, so it's only a matter of time until we establish a monopoly in the market."
If Amazon Connect is a complete commercial failure, Amazon's management will have a quantifiable indicator (revenue, or lack thereof) that suggests their internal tools are significantly lagging behind the competition.
In comparison with the member states of the European Union (EU), Croatia's median equivalent household income in terms of the Purchasing Power Standard (PPS) stands at 470, topping average PPS of the ten countries which joined the EU in 2004 (EU10), as well as Romania and Bulgaria, while significantly lagging behind the EU average.
"Except for a few men like Mcebo, male involvement is significantly lagging behind, and this is one area of serious weakness in the HIV response".
Therefore, India significantly lags behind developed nations in the progress of mortality transition that is, in demographic and epidemiological transition (28).
India still significantly lags behind European countries in the use of solar.
Companies with both catalogs and Web sites typically say their print divisions have significantly lagged behind their Internet operations.
The supply of affordable homes has only recently begun to increase and continues to significantly lag behind demand.
However, treatment options and device development for right ventricular failure (RVF) have significantly lagged behind those for LVADs.
On average, they found, the stocks of companies that had the largest exclusions significantly lagged behind those companies with the smallest ones.
MSNBC significantly lags behind both CNN and the Fox News Channel and has been identified as the most frustrating long-term problem for NBC.
However, the development of acceptable operating standards and quality control (QC) and quality assurance (QA) procedures significantly lags behind the current utilization level of HDD.
