"not available at present" is a correct and usable phrase in written English.
You can use it when something is not currently accessible or able to be provided, such as when a shop or store is closed or a service is suspended. For example: "The attraction is not available at present due to the ongoing pandemic."
When she asked the comprehensive school teenagers what sports they'd like to do that were not available at present, one girl said: "Swimming.
Any serious planning work requires better data, which is not available at present.
Due to the advanced configurations of tapered composite shells and their complex behavior, closed-form analytical solutions are not available at present regarding their response to compressive loading.
A systematic classification of which parts of an automated plant should be simulated at what respective level of detail is, however, not available at present time.
This client, built with JavaScript, is not available at present, but Nilas offered a preview on its blog, describing the service as something that would "feel native" on Windows, Mac and Linux.
However, 3D porous scaffolds featured by a relatively low stiffness (almost matching the natural muscle one) and highly stable in response to cyclic loadings are not available at present, in this context.
It was clear to all participants that the data necessary to address some important issues were simply not available at the present time.
In addition to patient clinical factors influencing their psychosocial state and choice of modality, a greater understanding of the complex interplay of patient and organisational factors and their impact on the adoption of home haemodialysis therapy is not available at the present time.
A utility index score was calculated for each subject's EQ-5D health status by applying the time trade-off-based valuations from a general UK population sample to the observed EQ-5D profile, as data from an Italian norm are not available at the present time.
However, this large body of evidence was not available at the beginning of the present study-.
However, these coils and sequences were not available at the time of the present study.
